Use the additive seasonal technique for stationary data to model the data. Use Solver to determine the optimal values of alpha and beta.

(A). What are the optimal values of alpha and beta?

(B). Prepare a line graph comparing the predictions from this method against the original data.

(C). What are the forecasts for each of the next 6 month using this technique?

Below is the Data set:

Here is what the answers should be: