Assume that your stock of sales merchandise is maintained based on the forecast demand. If the distributor's sales personnel call on the first day of each month, compute your forecast sales by each of the three methods requested here. June July August ACTUAL 132 172 200 a. Using a simple three-month moving average, what is the forecast for September? (Round your answer to 2 decimal places.) Forcast for September b. Using a welghted moving average, what is the forecast for September with weights of 0.10, 0.20, and 070 for June, July, and August, respectively? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Forecast for September c. Using single exponential smoothing and assuming that the forecast for June had been 128, forecast sales for September with a smoothing constant alpha of 0.30. (Round your answer to 2 decimal places.) Forecast for September