For the retail time series considered in earlier chapters: a. Develop an appropriate dynamic regression model with Fourier terms for the seasonality. Use the AIC to select the number of Fourier terms...

For the retail time series considered in earlier chapters:

a. Develop an appropriate dynamic regression model with Fourier terms for the seasonality. Use the AIC to select the number of Fourier terms to include in the model. (You will probably need to use the same Box-Cox transformation you identied previously.)

b. Check the residuals of the tted model. Does the residual series look like white noise?

c. Compare the forecasts with those you obtained earlier using alternative models.