The following table shows the actud demand observed over the inst 11 yeare: This arercise contains ony parts b, a, and d b) Using the 3-year moving averege, provide the forecast from periods 4 through 12 (round your mesponses to one deaimal plece), of Using the 3-year weightod moving averoge with weights 0.20,0.35, and 0.45, using 0.45 for the most recent period, provide the forecast from periods 4 through 12 fround ycur responses fo hwo decimal places). d) Mean absolute deviation for the forecast developed using the 3-year moving everage is 2.11 and for the 3-year weighted moving average is 2.33. Based on this information, the betier forecast is achieved using the approach