Use the following sales data: Week Sales 1 30 2 35 3 56 4 85 5 95 6 45 7 65 8 74 9 73 10 39 Use naive method, a three-period moving average and exponential smoothing with an a=0.35 for forecast sales...

Use the following sales data:

Week           Sales

1                     30

2                     35

3                     56

4                     85

5                     95

6                     45

7                     65

8                     74

9                     73

10                   39

Use naive method, a three-period moving average and exponential smoothing with an a=0.35 for forecast sales

Compare the forecasts using MSE and MAD. Explain which one is the best.

Make a forecast for weeks 11 and week 12 by using the optimal method.