17. Use the additive seasonal technique for stationary data to model the data. Use Solver to determine the optimal values of or and B. a. What are the optimal values of or and B? 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 teclmique? 18. Use the multiplicative seasonal technique for stationary data to model the data. Use Solver to determine the optimal values of or and [3. a. What are the optimal values of o: and B? 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 months using this technique