Which of these tasks are more suitable for WD-XRF|SEM-EDS and ICP-MS? 
     Determining the pigment in the different layers of a small paint sample.
    Accurately quantifying the content of the main elements in a clay sample weighing 42 mg.
     Determining the approximate elemental composition of a sewing needle from the 18th century.
     Determining the type of mordant used in dyeing of a small thread of wool.
     Determining the trace element pattern in a potsherd in order to get information for assigning its origin.
     Accurately quantifying the content of the main elements in a clay sample weighing 3.27 g.