The Figure Shows a Hollow Conducting Spherical Shell with an Inner

The figure shows a hollow conducting spherical shell with an inner radius of 8 cm and an outer radius of 10 cm.A charge,q,placed at the center of the shell causes an electric field at the inner surface of the shell,E_i,which has a magnitude of 80 N/C and points toward the center of the sphere.Additionally,there is an electric field at the outer surface,E_o,which has a magnitude of 80 N/C and points away from the center of the sphere.Determine the charge on the inner surface of the spherical shell.

A) 0 C
B) + 5.69 * 10^-11 C
C) + 8.89 * 10^-11 C
D) + 1.46 * 10^-10 C