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). c) Using the 3 -year weighted moving average with weights 0.15,0.30, and 0.55 , using 0.55 for the most recent period, provide the forecast from periods 4 through 12 (round your responses to two decimal places)