Consider the quadrature-modulated processes X(t) and X(t) that are respectively related to a weakly stationary process X(t) as X (t) = X(t) cos(2 ft+0) X (t) = X(t) sin(27 ft + 0) is uniformly distributed over the interval [0,2] and is Where the random variable independent with X(t). (a) Derive the cross-correlation function of X(t) and X(t): R (7) and R(7). (b) What is the correlation of X(t) and X(u) at the same time, i.e. t=u?