A conductive sphere with the radus a has the total amount of charge Q on its surface. a) Use Gauss's law to find the electric field outside the sphere at a distance R from the center of the sphere; a e) find the self capacitance of the sphere. (C=Q/V) 9 R b) Assuming electric potential is 0 at infinity, find the electric potential at the surface of the sphere. (Hint: Use the line integral V=-E-d)