Compute each part of given question:
Question: A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 17.0 cm, giving it a charge of -16.0 µC.
Part I: Find the electric field just inside the paint layer.
Part II: Find the electric field just outside the paint layer.
Part III: Find the electric field 9.50cm outside the surface of the paint layer.
You must show your work in an efficient manner so I can understand it in clearly.