The figure shows a spherical shell with uniform volume charge density ρ = 2.02 nC/m3, inner radius a = 8.00 cm, and outer radius b = 3.6a. What is the magnitude of the electric field at radial distances (a) r = 0; (b) r = a/2.00, (c) r = a, (d) r = 1.50a, (e) r = b, and (f) r = 3.00b? (a) Number Units (b) Number Units (c) Number Units (d) Number Units (e) Number Units (f) Number Units