A solid conducting sphere of radius 2.00 cm has a charge of 8.30 µC. A conducting spherical shell of inner radius 4.00 cm and outer radius 5.00 cm is concentric with the solid sphere and has a charge of −3.35 µC. Find the electric field (in N/m) at the following radii from the center of this charge configuration. (a) r = 1.00 cm magnitude N/Cdirection ---Select--- radially inward radially outward The magnitude is zero. (b) r = 3.00 cm magnitude N/Cdirection ---Select--- radially inward radially outward The magnitude is zero. (c) r = 4.50 cm magnitude N/Cdirection ---Select--- radially inward radially outward The magnitude is zero. (d) r = 7.00 cm magnitude N/Cdirection