Solve the all parts of given question:
Question: A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 16.0cm, giving it a charge of -16.0 uc,
Part A: Find the electric field just inside the paint layer.
Part B: Find the electric field 5.00cm outside the surface of the paint layer.
I don't know how to get that answer for the above question. Please help! Thanks.