4 5 6 7 8 9 10 1 8 2 9 3 4 11 6 9 13 8 11 13 10 9 4 5 6 7 8 10 11 The following table shows the actual demand observed over the last 11 years: Year Demand This exercise contains only parts b, c, and d. b) Using the 3-year moving average, provide the forecast from periods 4 through 12 (round your responses to one decimal place). Year 9 12 Forecast c) Using the 3-year weighted moving average with weights 0.10, 0.25, and 0.65, using 0.65 for the most recent period, provide the forecast from periods 4 through 12 (round your responses to two decimal places) 11 12 Forecast d) Mean absolute deviation for the forecast developed using the 3-year moving average is 2.43 and for the 3-year weighted moving average is 2.93. Based on this information, the better forecast is achieved using the approach. Year 5 6 7 8 9 10 3-year moving average weighted moving average