Here is the data to work with:

Week	Auto Sales
1	8
2	10
3	9
4	11
5	10
6	13
7	-

Using the Naive Method the MAD for the forecast of weeks 4-7=2

Using a 3-week moving average method the MAD for the forecast of weeks 4-7 =1.67

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HERE IS MY QUESTION:

Develop a 3-week weighted-moving average and make a forecast for week 4-7 using the following weights. What is the MAD for your forecast?

Weights	Period
3	Last week
2	Two weeks ago
1	Three weeks ago