In Figure two large, thin metal plates are parallel and close to each other. On their inner

Question:

In Figure two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have excess surface charge densities of opposite signs and magnitude 7.00 x 10-22C/m2. In unit-vector notation, what is the electric field at points?

(a) To the left of the plates,

(b) To the right of them, and