Use these data and your computer to prepare a managerial report $(10$ points$)$ along the following guidelines:

$1.$ Use exponential smoothing to develop simple, trend $($Holt$\text{'}$s$),$ and seasonal models $($both simple and trend$)$ for forecasting the quarterly revenue from $2-$year plans. Do the same for $5-$year plans, and also for the total revenue. Use the RMSE performance measure for selecting the best model in each case. $(40$ points$)$