a. Using a simple three-month moving average, what is the forecast for September? b. Using a weighted moving average, what is the forecast for September with weights of 0.30, 0.40, and 0.30 for June, July, and August, respectively?  c. Using single exponential smoothing and assuming that the forecast for June had been 132, forecast sales for September with a smoothing constant alpha of 0.20.

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