A point charge -q is located at the center of spherical conducting shell with negligible thickness and a net charge of +4q. See figure. If V=0 at r= 2R, find the potential, V, at r = R. You may assume spherical symmetry. Start with V - V = -. d. The knowns are q, 2 1 R, and E. Hint: Your answer should be a specific value of V, not an equation with r in it. (10 points) R spherical shell, +4q