Last week’s sales of a product at a retail store are shown in the following table

Last week’s sales of a product at a retail store are shown in the following table:
Day Sales (Dollars)
1 200
2 250
3 180
4 190
5 175
6 170
7 180

(a) Use the 3-day moving average method for forecasting days 4-7.
(b) Use the 3-day weighted moving average method for forecasting days 4-7. Use Weight 1 day ago = 4, Weight 2 days ago = 3, and Weight 3 days ago = 2.
(c) Compare the techniques using the Mean Absolute Deviation.


Please do in word, not excel, see formatted question attached