Hi, Requesting Urgent help in answering the question below in the picture. Please include detailed explanations where necessary.

The sample autocorrelation function (SACF) and the sample partial auto- correlation function {SPACE are calculated from a time series of size 50. The values at the rst three lags are shown in the table below Lag SACF SPACF 1 0.854 0.854 2 0.820 0.371 3 0.762 0.085 and the sample variance is if (0) = 1.253. (i) Based on the table alone, suggest a model for the data. Give reasons why you select your model. (ii) Consider the AR(1) model Y}. = GIYtl + 5:: where E; is a white noise error term with mean zero and variance 0\". With the help of Yule-Walker and the table of values above, calculate method of moments estimates a] and 32 for 051 and 02. {iii} Consider the AR(2) model K = GIYtl + an2 + 5:: where E; is a white noise error term with mean zero and variance 0\". With the help of Yule-Walker and the table of values above, calculate method of moments estimates a], a; and 32 for or], or; and :72