A solid conducting sphere of radius 2.00 cm has a charge of 8.55 JC. 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 -3.00 UC. Find the electric field at the following radii from the center of this charge configuration. (a) r = 1.00 cm magnitude N/C direction -Select--- ) r = 3.00 cm magnitude N/C direction -Select--- (c) r = 4.50 cm magnitude N/C direction -Select-- (d) r = 7.00 cm magnitude N/C direction -Select