Based upon the following historical data, answer the following questions: a Calculate the weighted three-month moving average forecast using weights of w1 -0.50,w2 -0.30, and w3 = 0.20 for periods 4 to 12. Use MSE and MAPE to measure accuracy of the forecasting model. Which of the two forecast accuracy methods (in question b) would you prefer and why? Week Actual Weck Actual Demand Demand 200 7 180 2 150 220 3 300 160 4 200 10 140 S 250 11 165 6 280 12 185 1 8 9