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 year 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) 1) to forecast sales for year 2002