(SHOW YOUR COMPLETE WORK) Two independent forecasting methods 1 and 2 have been used each week for the past ten weeks. The actual demand and demand forecasts from these two methods are shown helow a. Calculate the Mean Absolute Deviation (MAD) measures for forecasting methods 1 and 2. Which forecasting method is better based on MAD? b. Calculate the Mean Squared Error (MSE) measures for forecasting methods 1 and ? Which forecasting method is better based on MSE? c. Calculate the Mean Absolute Percent Error (MAPE) measures for forecasting methods 1 and 2. Which forecasting method is better based on MAPE