{"id":57,"date":"2025-01-31T09:23:12","date_gmt":"2025-01-31T07:23:12","guid":{"rendered":"https:\/\/sisu.ut.ee\/signaalitootlus2\/kontrollkusimused-3-osa-kohta\/"},"modified":"2025-01-31T09:23:12","modified_gmt":"2025-01-31T07:23:12","slug":"kontrollkusimused-3-osa-kohta","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/signaalitootlus2\/kontrollkusimused-3-osa-kohta\/","title":{"rendered":"Kontrollk\u00fcsimused 3. osa kohta"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam4\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-4\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"  watupro-required-25 watupro-question-id-25\">\n\t\t\t<div class=\"question-content\"><div><p>There are several kernels for 2D image blurring. Two common kernels are the Boxcar and Gauss. Which of these 2 creates less distortions and is preferred, but is slightly more complex to compute?<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"25\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType25\" class=\"answerTypeCnt1\" value=\"radio\"><input type=\"hidden\" id=\"watupro-required-question-25\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices25\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-25[]\" id=\"answer-id-64\" class=\"answer   answerof-25 \" value=\"64\"><label for=\"answer-id-64\" id=\"answer-label-64\" class=\" answer\"><span><p>Boxcar<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"radio\" name=\"answer-25[]\" id=\"answer-id-65\" class=\"answer   answerof-25 \" value=\"65\"><label for=\"answer-id-65\" id=\"answer-label-65\" class=\" answer\"><span><p>Gauss<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"  watupro-required-26 watupro-question-id-26\">\n\t\t\t<div class=\"question-content\"><div><p>Single SideBand suppressed carrier (SSB) is a technique used for amplitude modulation. What are the reasons to use it?<\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"26\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType26\" class=\"answerTypeCnt2\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-26\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices26\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-26[]\" id=\"answer-id-66\" class=\"answer   answerof-26 \" value=\"66\"><label for=\"answer-id-66\" id=\"answer-label-66\" class=\" answer\"><span><p>Carrier does not contain information, but consumes energy. Hence it does not need to be transmitted and power could be saved.<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-26[]\" id=\"answer-id-67\" class=\"answer   answerof-26 \" value=\"67\"><label for=\"answer-id-67\" id=\"answer-label-67\" class=\" answer\"><span><p>Both sidebands of an AM-signal contain the same information. We can transmit only one and compute the other from the one received. It helps to save spectrum as two times less spectrum is used to transmit the same information.<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-26[]\" id=\"answer-id-68\" class=\"answer   answerof-26 \" value=\"68\"><label for=\"answer-id-68\" id=\"answer-label-68\" class=\" answer\"><span><p>Two sidebands contain the same information, but power is spent on transmitting both of them. It helps to save power to transmit only one sideband.<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-26[]\" id=\"answer-id-69\" class=\"answer   answerof-26 \" value=\"69\"><label for=\"answer-id-69\" id=\"answer-label-69\" class=\" answer\"><span><p>The use of only single sideband helps to reduce errors. As narrower bandwidth is used it is less likely that interference with other signals happens.<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-3\" style=\";\"><div id=\"questionWrap-3\" class=\"  watupro-required-27 watupro-question-id-27\">\n\t\t\t<div class=\"question-content\"><p>Consider these two kernels:<\/p><p>A)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"292\" height=\"287\" class=\"alignnone wp-image-15\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/lowpass.png\" title=\"lowpass.png\" alt=\"lowpass.png\"><\/p><p>B)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"313\" height=\"283\" class=\"alignnone wp-image-16\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/highpass.png\" title=\"highpass.png\" alt=\"highpass.png\" srcset=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/highpass.png 313w, https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/highpass-300x271.png 300w\" sizes=\"auto, (max-width: 313px) 100vw, 313px\"><\/p><p>Connect right filter with right kernel.<\/p><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_27\"><tr><td class=\"watupro-matrix-left-cell\">A<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable27\" id=\"watuPRODroppableCell70\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell70', 0);return false;\">highpass<!--WTPMD5af9a252c01dadf6eb482a6ce44a9c43b--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell70', 1);return false;\">lowpass<!--WTPMD5f4264a824899ff8f0fc5962ff60b9cef--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-27 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell70\" name=\"matrix-left-70\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">B<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable27\" id=\"watuPRODroppableCell71\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell71', 0);return false;\">highpass<!--WTPMD5af9a252c01dadf6eb482a6ce44a9c43b--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell71', 1);return false;\">lowpass<!--WTPMD5f4264a824899ff8f0fc5962ff60b9cef--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-27 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell71\" name=\"matrix-left-71\" value=\"\"><\/td><\/tr><\/table><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_3\" value=\"27\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType27\" class=\"answerTypeCnt3\" value=\"nmatrix\"><input type=\"hidden\" id=\"watupro-required-question-27\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-4\" style=\";\"><div id=\"questionWrap-4\" class=\"  watupro-required-28 watupro-question-id-28\">\n\t\t\t<div class=\"question-content\"><p>Consider these spectra:<\/p><p>A)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"375\" height=\"194\" class=\"alignnone wp-image-17\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/am_spectrum.gif\" title=\"am_spectrum.gif\" alt=\"am_spectrum.gif\"><\/p><p>B)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"636\" height=\"230\" class=\"alignnone wp-image-18\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/bpsk_spectrum.gif\" title=\"bpsk_spectrum.gif\" alt=\"bpsk_spectrum.gif\"><\/p><p>C)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" class=\"alignnone wp-image-19\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/fm_rec6.gif\" title=\"fm_rec6.gif\" alt=\"fm_rec6.gif\"><\/p><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_28\"><tr><td class=\"watupro-matrix-left-cell\">A<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable28\" id=\"watuPRODroppableCell72\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell72', 0);return false;\">Phase shift keying<!--WTPMD59e56fc44be7c4c04b30afee1dc486239--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell72', 1);return false;\">Amplitude modulation<!--WTPMD52f8bcb873f308740bccc9eb3921a2a35--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell72', 2);return false;\">Frequency modulation<!--WTPMD59f4d5adb5bd4949d1d6ac8df6392e9cd--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-28 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell72\" name=\"matrix-left-72\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">B<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable28\" id=\"watuPRODroppableCell73\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell73', 0);return false;\">Phase shift keying<!--WTPMD59e56fc44be7c4c04b30afee1dc486239--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell73', 1);return false;\">Amplitude modulation<!--WTPMD52f8bcb873f308740bccc9eb3921a2a35--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell73', 2);return false;\">Frequency modulation<!--WTPMD59f4d5adb5bd4949d1d6ac8df6392e9cd--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-28 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell73\" name=\"matrix-left-73\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">C<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable28\" id=\"watuPRODroppableCell74\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-2-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell74', 0);return false;\">Phase shift keying<!--WTPMD59e56fc44be7c4c04b30afee1dc486239--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell74', 1);return false;\">Amplitude modulation<!--WTPMD52f8bcb873f308740bccc9eb3921a2a35--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell74', 2);return false;\">Frequency modulation<!--WTPMD59f4d5adb5bd4949d1d6ac8df6392e9cd--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-28 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell74\" name=\"matrix-left-74\" value=\"\"><\/td><\/tr><\/table><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_4\" value=\"28\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType28\" class=\"answerTypeCnt4\" value=\"nmatrix\"><input type=\"hidden\" id=\"watupro-required-question-28\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-5\" style=\";\"><div id=\"questionWrap-5\" class=\"  watupro-required-29 watupro-question-id-29\">\n\t\t\t<div class=\"question-content\"><div class=\"qtext\"><p>Low-pass filters are commonly used to filter out high-frequency noise. Ideal filter has very sharp frequency response. That means up to a given frequency f_l all the frequency components are passed and over that frequency f_l all frequency components are completely discarded.<\/p><p>All real filters have softer transition from passed to blocked frequencies.<\/p><p>Consider these kernels:<\/p><p>A)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"360\" class=\"alignnone wp-image-20\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/sinc.png\" title=\"sinc.png\" alt=\"sinc.png\" srcset=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/sinc.png 500w, https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/sinc-300x216.png 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"><\/p><p>B)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"550\" height=\"396\" class=\"alignnone wp-image-22\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/sinc_full.png\" title=\"sinc_full.png\" alt=\"sinc_full.png\" srcset=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/sinc_full.png 550w, https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/sinc_full-300x216.png 300w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\"><\/p><p>C)<\/p><p><img loading=\"lazy\" decoding=\"async\" width=\"443\" height=\"256\" class=\"alignnone wp-image-23\" style=\"\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/pnnradialbasisfunction.jpg\" title=\"pnnradialbasisfunction.jpg\" alt=\"pnnradialbasisfunction.jpg\" srcset=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/pnnradialbasisfunction.jpg 443w, https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/40\/pnnradialbasisfunction-300x173.jpg 300w\" sizes=\"auto, (max-width: 443px) 100vw, 443px\"><\/p><p>Connect the time-domain kernels (impulse response) with the corresponding edge sharpness.<\/p><\/div><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_29\"><tr><td class=\"watupro-matrix-left-cell\">A<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable29\" id=\"watuPRODroppableCell75\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell75', 0);return false;\">Sharpest frequency response edge<!--WTPMD5b9a2170f3589d30721ccc8b3543ebd4a--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell75', 1);return false;\">Soft frequency response edge<!--WTPMD5dbc49e794d9237d3ba7550b692bffec1--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell75', 2);return false;\">Medium frequency response edge<!--WTPMD5db67c28835094f66d4497cf8ed569ff7--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-29 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell75\" name=\"matrix-left-75\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">B<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable29\" id=\"watuPRODroppableCell76\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell76', 0);return false;\">Sharpest frequency response edge<!--WTPMD5b9a2170f3589d30721ccc8b3543ebd4a--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell76', 1);return false;\">Soft frequency response edge<!--WTPMD5dbc49e794d9237d3ba7550b692bffec1--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell76', 2);return false;\">Medium frequency response edge<!--WTPMD5db67c28835094f66d4497cf8ed569ff7--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-29 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell76\" name=\"matrix-left-76\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">C<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable29\" id=\"watuPRODroppableCell77\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-2-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell77', 0);return false;\">Sharpest frequency response edge<!--WTPMD5b9a2170f3589d30721ccc8b3543ebd4a--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell77', 1);return false;\">Soft frequency response edge<!--WTPMD5dbc49e794d9237d3ba7550b692bffec1--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell77', 2);return false;\">Medium frequency response edge<!--WTPMD5db67c28835094f66d4497cf8ed569ff7--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-29 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell77\" name=\"matrix-left-77\" value=\"\"><\/td><\/tr><\/table><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_5\" value=\"29\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType29\" class=\"answerTypeCnt5\" value=\"nmatrix\"><input type=\"hidden\" id=\"watupro-required-question-29\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div style=\"display:none\" id=\"question-6\">\n\t<div class=\"question-content\">\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\">\u00a0Loading...\t<\/div>\n<\/div>\n\n<br>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons4\">\n\t\t  <div id=\"prev-question\" style=\"display:none;\"><input type=\"button\" value=\"&lt; Previous\" onclick=\"WatuPRO.nextQuestion(event, 'previous');\"><\/div>\t\t  \t\t  \t\t   \n\t\t   \t  \t\t<div><input type=\"button\" 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