PLEASE SOLVE ALL PARTS

a$.$ When you put charge on a conductor, does the charge stay where you put it$,$ spread out over the surface, or spread out both over the surface and throughout the middle?

b$.$ Two conducting spheres are set $3\mathrm{.}6nm$ apart. The first sphere has $825$ extra electrons on it$,$ and feels a repulsive force away from the other sphere of $9\mathrm{.}34{10}^{-6}N.$ Does the second sphere have extra electrons, or is it missing electrons?

c$.$ How many electrons? $[638$ e$]$

d$.$ Does the second conducting sphere feel a force that is stronger, weaker, or the same as $9\mathrm{.}34{10}^{-6}N?$