A solid conducting sphere of radius 2.00 cm has a charge of 7.85 µC. A 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 -3.05 µC. Find the electric field at the following radii from the center of this charge configuration:
(a) At �=1.00
r=1.00 cm, find the magnitude and direction of the electric field.
