(b) For the following processes {X}, identify SARIMA (p, d, q) x (P, D, Q), model: (i) (1 - B12)2Xt = (1 -0.3B) Zt; (ii) Xt = 0.5Xt-6 + Zt; (iii) (1 - 0.8B)(1 + 0.5B*)Xt = (1 -1.5B)Zt. (c) You are given a time series model where PACF is zero except for lags 12 and 24. Which model will have this pattern