Winters method. Start with the following initial estimates at time 0: Level=767.79; Trend=17.87; Seasonal factors for seasons 1 to 4 = 0.70, 0.76, 0.86, and 0.66. Assume =0.1, =0.1, =0.1. Use year 1 quarter 1 actual to update your level, trend, and seasonal estimates. Show all calculations clearly and write down all equations. Identify the season for your seasonal factor calculation

Year Quarter Sales

1	1	544
	2	582
	3	681
	4	557
2	1	628
	2	707
	3	773
	4	592
3	1	627
	2	725
	3	854
	4	661