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Problem 3-21 (Algo) Two different forecasting techniques (F1 and F2) were used to forecast demand for cases of bottled water. Actual demand and the two sets of forecasts are as follows: Period 1 2 3 Demand 6B 75 70 74 69 72 80 78 PREDICTED DEMAND P1 P2 63 62 66 61 73 70 65 71 71 73 69 73 70 76 72 80 5 7 Click here for the Excel Data File a. Compute MAD for each set of forecasts, Given your results, which forecast appears to be more accurate? (Round your answers to 2 decimal places.) Answer is complete but not entirely correct. MAD F1 5.50 4.13 MAD F2 Answer is complete and correct. F2 appears to be more accurate, b. Compute the MSE for each set of forecasts. Given your results, which forecast appears to be more accurate? (Round your answer to 2 decimal places.) MSE F1 MSE F2 appears to be more accurate, c. In practice, either MAD or MSE would be employed to compute forecast errors. What factors might lead a manager to choose one rather than the other? Either one might already be in use, familiar to users, and have past values for comparison. If are used, MSE would be naturatif are used, MAD WOU d. Compute MAPE for each data set. Which forecast appears to be more accurate? (Round your intermediate calculations to 2 decimal places and and final answers to 2 decimal places.) % MAPE F1 MAPE F2