Let x(t) = (1+j) exp(j2(t/7+3/4)). (a) (10 pts) Express x(t) in polar form for all t. I.e., find real signals r(t) and (t) such that x(t) r(t) exp(jo(t)). It is not necessary for 0 (t) to satisfy 0 0(t) < 2. (b) (10pts) Find Re{x(t)} and Im{x(t)}. Let x(t) = (3-4j) exp(j2(2t/3)) + (5 12j) exp(j2(4t/15)). - (a) (5 pts) Find the fundamental period of x. (b) (10 pts) Find the power of x. =