5. You are given PACF for two stationary processes: (a) For time series {Xht = 1,2, . . .}: $11 = 0, (522 = 0.36, (kk = 0 for k 2 3. (b) For time series {Y},t = 1,2,. . } : @511 = 0.7, (by, = 0 for k 2 2. In each case, write an appropriate equation for the corresponding stationary process