Consider the following historical demand data: a. Develop a 3-period moving average from period 4 through 11 . b. Develop a three-period weighted moving average forecast for periods 4 through 11. Use weights of 0.4,0.35, and 0.3 , with the most recent observation weighted the highest. c. Develop two exponential smoothing forecasts for periods 2 through 11. For the first forecast, use a=0.2. For the second, use a=0.7. d. Calculate the MAD values for periods 4 through 10 . Which method is the most precise one? Consider the following historical demand data: a. Develop a 3-period moving average from period 4 through 11 . b. Develop a three-period weighted moving average forecast for periods 4 through 11. Use weights of 0.4,0.35, and 0.3 , with the most recent observation weighted the highest. c. Develop two exponential smoothing forecasts for periods 2 through 11. For the first forecast, use a=0.2. For the second, use a=0.7. d. Calculate the MAD values for periods 4 through 10 . Which method is the most precise one