$($a$)(5)$What is the average size of the spherical particles or 'spherules'?

$($b$)(5)$What is the possible chemical composition or material of the spherical particle

based on the EDS data provided below $?$ Do you think it is common to see Fe in 'dust'?

Figure caption: EDS spectrum for a

typical metal$-$rich spherule, $K$ and $L$

lines for noted elements are labeled.

Elemental contents in atomic percent

are approximately: $O(63),Si(14),Fe$

$(11),Al(9),K(1),Mg(0\mathrm{.}4),Na(0\mathrm{.}4),$

$Ni(0\mathrm{.}3)$ and $S(0\mathrm{.}2)$; the small $C$ peak is

likely from the carbon conductive tab

used to hold the sample.

$($c$)(15)$describe a new experiment that you would undertake to evaluate in more

detail the chemical composition of the spherules.