== There is a surface charge density σ(0) σocos (20), where σ is a constant, on the surface of a sphere of radius R. (a) What is the potential V(r, 0) inside and outside of the sphere? (b) What is the electric field Ĕ(r, 0) inside and outside of the sphere? (c) Confirm that the sphere is discontinuous at the surface of the sphere in accordance with the surface charge distribution.