You obtain the following sample autocorrelations and partial autocorrelations for a sample of 100 observations from actual data

lag	1	2	3	4	5	6	7	8
acf	0.420	0.104	0.032	-0.206	-0.308	0.042	-0.018	0.074
pacf	0.632	0.381	0.268	0.199	0.205	0.101	0.096	0.082

Identify the most appropriate time series process for this data. Justify your answer

(4 Marks)

Use the Ljung-Box Q* test to determine whether the first three autocorrelation coefficients taken together are jointly significantly different from zero at 5% level (Use critical chi-squared value = 11.1). (6 Marks)