quantitative methods

For the data below: (a) Develop a 3 -year moving average to forecast sales for year 1995 (b) Develop a 4 year moving average to forecast sales for yoar 2002 . (c) Develop a 3 year weighted moving average of (3,2,1) to forecast sales for year 1995 . (d) Develop a 4-year weighted moving average of (3,2,1,1) to forecast sales for year 2002