1. For each of the following functions decide whether or not the function is a linear transformation. Prove your answer in each case :
(a) F : V3(R) ® V2(R), defined by F(a1, a2, a3) = (a1 + a2 + a3, 3a2)
(b) G : V3(R) ® V2(R), defined by G(a1, a2, a3) = (a1 + 3, a2 - a3).