21. Two different forecasting techniques (FI and F2) were used to forecast demand for cases of bottled water. Actual demand and the two sets of forecasts are as follows: PREDICTED DEMAND Period Demand F2 1 68 66 2 75 68 3 70 70 4. 74 F18 8 RARRA 72 5 69 74 6 72 76 7 80 78 8 78 80 Chapter 3 problem 21 Based on given information, if we use 4-period moving average to predict the demand of period 9, what will the forecast be? (Keep 2 digits after the decimal point.) 73.52 74.75 76.50 None of above (K Chapter 3 problem 21 Based on given information, if we use 4-period weighted moving average the 4 weights are (0.4, 0.3, 0.2, 0.1), to predict the demand of period 9, what will the forecast be? (Keep 2 digits after the decimal point.) 74.21 76.5 7.84 None of above Chapter 3 problem 21 Based on given information, if we use exponential smoothing forecast with a = 0.2 to predict the demand of period 9, what will the forecast be? (Using 68 as forecast demand for period 2, keep 2 digits after the decimal point.) 73.52 74.15 76.28 None of above Chapter 3 problem 21 What is the MAD for forecast technique 1? QUESTION 5 Chapter 3 problem 21 What is the MSE for forecast technique 2? QUESTION 6 Chapter 3 problem 21 What is the MAPE for forecast technique 17 (Please use decimal format with 4 digits after the decimal point.)