Iwo cifferent forecasting techniques were used to forecast demand tor cases of bottled water in a store. Actual demand and the two sets of forecasts for seven periods are as follows: a-1. Calculate the MAD for each set of forecasts. (Round the final answers to 2 decimal places.) a-2. Which technique appears to be more accurate? b-1. Calculate the MSE for each set of forecasts. (Round the final answers to 2 decimal places.) b-2. Which technique appears to be more accurate? -1. Calcuiate the MAPE for each set of forecasts. (Round the final answers to 2 decimal places.) c-2. Which technique appears to be more accurate