The foiiowing table shows the acmal demand observed over the iast 11 years: Year 1 2 3 4 5 6 il' 3 Q 10 11 Demand 3 9 4 9 12 I" 11 13 9 13 I" Th6 exercise contains only parts b, c, and d. b) Using the 3year moving average, provide the forecast from pen'ods :1 through '12 (round your responses to one decimatpiace). Year 4 5 B T B 9 10 11 12 Forecast c} Using the year weighted moving average with weights [1.20, 0.25, and 1155, using 0.55 for the most recent period, provide the forecast from periods 4 through 12 (round yourresponses to two ci'ecii'narI pieces). Year 4 5 6 7 8 9 1D 11 12 Forecast d) Mean absolute deviation for the forecast developed using the 3-year moving average is 2.59 and for he 3year weighted moving average is 3.11. Based on this information the better forecast is achieved using the V approach