Year Q Sales (1000's) a. Plot the series and indicate the 15 10 appropriateness of seasonal and trend time series components 18 15 b. Develop and produce the seasonal indexes 14 26 all your corrections by multiple regression methods in Minitab. 14 4 4 4 4 c. Complete the final forecast for each quarter 28 25 20 of year 6. Include both seasonality and trend in the model. Year Q Sales (1000's) a. Plot the series and indicate the 15 10 appropriateness of seasonal and trend time series components 18 15 b. Develop and produce the seasonal indexes 14 26 all your corrections by multiple regression methods in Minitab. 14 4 4 4 4 c. Complete the final forecast for each quarter 28 25 20 of year 6. Include both seasonality and trend in the model