Problem 3-21 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: PREDICTED DEMAND F1 F2 Period Demand 68 63 60 a. Compute MAD for each set of forecasts. Given your results, which forecast appears to be more accurate? (Round your answers to 2 decimal place.) MAD F1 MAD F2 6.00 MAD F1 MAD F2 F1 appears to be more accurate b. Compute the MSE for each set of forecasts. Given your answers to 2 decimal places.) forecast appears to be more accurate? (Round your MSE F1 MSE F2 F1 appears to be more accurate, c. 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 F1 appears to be more accurate