Question: 2. Given the autocorrelations in Figure 39 and the partial autocorrelations in Figure 40, what regular (nonseasonal) terms might John include in an ARIMA model

2. Given the autocorrelations in Figure 39 and the partial autocorrelations in Figure 40, what regular (nonseasonal) terms might John include in an ARIMA model for Mr. Tux sales? What seasonal terms might he include in the model?

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