3. For the following time series use both regression and Holt's as requested. a. Use the regression model for the entire time series to generate the prediction equation. Write down the equation b. Now use the regression equation to calculate the rst four terms of MAPE. Show your calculations. (2. Run the Holt's model on the entire time series to nd the optimal values of alpha and gamma that minimize MSE. What values do you get? d. Would you rather use the optimal Holt's model you found in part 'c', or the linear regression of part 'a' based on MSE? Why? If you could not get a solution for part 'c', use alpha = .65, and gamma = +4, for Holt's, and answer the question here. e. The Holt's model was used to obtain a forecast for period 41, with condence level of 95%. The result follows: F41 = 401.83+f 16.014. Use the regression model and nd at which condence level you can get the same accuracy for period 41 as you got from the Holt's model {hint which value expresses the accuracy of the forecast?)