Year	Automobile Sales	Year	Automobile Sales
1990	116	1977	119
1991	105	1998	34
1992	29	1999	34
1993	59	2000	48
1994	108	2001	53
1995	94	2002	65
1996	27	2003	111

(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) to forecast sales for year 2002.