The space between two concentric conducting spherical shells of radii b = 2.20 cm and a = 1:30 cm is filled with a substance of dielectric constant k = 19.1. A potential difference V = 79.0 V is applied across the inner and outer shells. Determine (a) the capacitance of the device, (b] the free charge q on the inner shell, and (c) the charge q induced along the surface of the inner shell, (a) Number Units (b) Number i Units (c) Number Units