Given below are the ACFs and PACFs from 3 stationary time series. Based on your examination of the ACFs and PACFs, propose a time series model for

1. Situation 1
2. Situation 2
3. Situation 3
4. Situation 4

Give a reason to support your answer in each case. If an appropriate model is not evident from these plots in any of the 3 situations, explain carefully why you believe this is so.

\fTime Series Basic Diagnostics Lag AutoCorr -8-.6-4-.20 .2 .4 .6 .8 Ljung-Box Q p-Value Lag Partial -.8-.6-.4-.20 .2 4 .6 .8 O 1.0000 0 1.0000 -0.4656 109.056 <.0001 in>