1. The problem statement, all variables and given/known data A solid insulating sphere of radius a has a uniform charge density p and a total charge Q. Concentric with this sphere is an uncharged, conducting, hollow sphere whose inner and outer radii are b and c. (a) Find the magnitude of the electric field in the regions r<a, a<r<b, b<r<c, and r<c. (b) Determine the induced charge per unit area on the inner and outer surfaces of the hollow sphere. 2. Relevant equations Gauss's Law= S E dA= Q/E_0 3. The attempt at a solution S E dA= Q/E_0 = E(4pir^2)= Q/E_0 I am doing this right so far? if so not sure what to do next, if not, not sure what to do.