Two metal spheres, each of radius 3.0 cm, have a center-to-center separation of 2.0 m. Sphere 7 has charge + 1.0 x 10-8 C; sphere 2 has charge – 3.0 x 10-8 C. Assume that the separation is large enough for us to assume that the charge on each sphere is uniformly distributed (the spheres do not affect each other). With V = 0 at infinity, calculate

(a) The potential at the point halfway between the centers and the potential on the surface of

(b) Sphere 1 and

(c) Sphere 2.