A discrete-time

a) A discrete-time WSS random sequence X[n] has the following autocorrelation sequence Rxx [m] = 1+0.5 /m), |m| 4, = 0, |m| > 4 Compute the spectrum Sx(w). [5 marks] b) Given autocorrelation function of X(t) is Rxx (T) = Be-2171 Compute the power spectral density Sx (w) [ 5 marks]