1. The problem statement, all variables and given/known data Consider a solid conducting sphere with a radius 1.5 cm and charge -4.4pC on it. There is a conducting spherical shell concentric to the sphere. The shell has an inner radius 3.7 cm and outer radius 5.1 cm and a net charge 27.4 pC on the shell. A) denote the charge on the inner surface of the shell by Q'2 and that on the outer surface of the shell by Q ''2 . Find the charge Q''2. Answer in units of pC. B) Find the magnitude of the electric field at point P, midway between the outer surface of the solid conducting sphere and the inner surface of the conducting spherical shell. Answer in units N/C. C) Find the potential V at point P. Assume the potential at r = infinity. Answer in units of volt. 2. Relevant equations E =kQ/r^2 V = kQ/r 3. The attempt at a solution I've figured out parts A and B but I'm struggling with Part C. I used the equation V = kQ/r where Q = -4.4e-12C ; k = 8.98755e9 and r = 0.026 m My answer (-1.52 V) is wrong but I have no idea why. Please help if you can.