Please help me solve part C. could you allow see if my MA(3) and part D is correct. the yellow are answers/help i need.

b) Using the 3 -year moving average, provide the forecast frompcriods 4 through 12 (round your responses to one decimal place). c) Using the 3-year weighted moving average with weights 0.10,0.30, and 0.60 , using for the most recent period, provide the forecast from periods 4 through 12 (round your responses to one decimal place). d) Mean absolute deviation for the forecast developed using the 3-year moving average is 2.33 and for the 3-year weighted moving average is 2.83. Based on this information, the better forecast is achieved using the