Q. 13 State any two properties of auto correlation function, Q. 14 Find 4 The autocorrelation function of a stationary process is Rxx (t)= 25+ 1+672 the mean and variance of the process. Q. 15 Define cross correlation function of X(t) and Y(t). When do you say that they are independent? Q. 16 Find the variance of the stationary process X(t) whose autocorrelation function is given by R(t)=2 + 4e-471 Q. 17 The autocorrelation function of a stationary process is Rxx (t)= 16+ Find the mean and variance of the process. Q. 18 If R(t) = e =20 tl is the auto correlation function of a random process X(t), obtain the spectral density of X(t). Q. 19 If the power spectral density of a WSS process is give by S(o)= a -la-lo) Jola 1+67? @l>a ;