5. (SPR 5.87) Consider the random processes X (t) = An cos(wot + 0) Y (t) = Al cos(wit + () where Ao, Al, wo, wi are constants and r.v.'s O and & are independent and uniformly dis- tributed over (-1, T). (a) Find the cross-correlation function Rxy (t, t +7) of X(t) and Y(t). (b) Repeat (a) if 0 = 4