5.2. The random process X (t) is given by X (t) Acos (wt), = where A and are random variables with the probability density function, fAD (a,b) = Derive (a) #x, (b) ox, and (c) Rxx (t1, t2). 1 2π (1 + (3a - 1) cos o), for 02πT and 0≤a≤1.