A very large nonconducting plate lying in the xy-plane carries a charge per unit area of 5θ. A second such plate located at z = 5.00 cm and oriented parallel to the xy-plane carries a charge per unit area of -7θ. Find the electric field for the following.
(a) z < 0
(b) 0 < z < 5.00 cm
(c) z > 5.00 cm