A -6-nC point charge is located at the center of a conducting spherical shell. The shell has an inner radius of 2 m, an outer radius of 4 m, and a charge of +7 nC. (Let the radially outward direction be positive.)
(a) What is the electric field at r = 1 m?
(b) What is the electric field at r = 3 m?
(c) What is the electric field at r = 6 m?
(d) What is the surface charge distribution, s, on the outside surface of the shell?