2. Consider the parallelogram formed by the points E(1, 2, 3), F(0, 3, 5), G(0, 1, 2) and H.
(a) Show how to find point H if this point has a z-coordinate of 4.
(b) Find $\angle F$ using vector concepts.
(c) Find the area of $\triangle EFG$ using vector concepts.