5 points Save Answer Based upon the following historical data, calculate the following forecast and specify what procedure you would utilize. a. Calculate the simple four-month moving average forecast for periods 5 to 12. b. Calculate the weighted four-month moving average using weights of W1 = 0.1, W2 = 0.20, W3 = 0.30, and W4 = 0.4 for periods 5 to 12. c. Calculate MAD for the forecasts made above. Which forecasting method do you prefer? Period Period 1 2 3 4 5 6 Actual Demand 58 70 100 110 112 90 7 8 9 10 11 12 Actual Demand 120 138 122 128 110 88