An insulating spherical shell of radius inner radius A and outer radius B, has a non- uniform charge density given by p(r) = ar³ where a is a constant. Concentric with this spherical shell is an insulating spherical shell with inner radius B, outer radius C, and a uniform charge density such that the electric field strength is zero for r > c. a. What is the total charge on the inner spherical shell? b. What is the charge density in the outer spherical shell? c. What is the electric field everywhere (r <A, A < r < B, and B <r<C?