1. Calculate three forecasts using the following data.
   1. For periods 4 through 10, develop the exponentially smoothed forecasts using a forecast for period 3 (F3) of 72.0 and an alpha of 0.4.
   2. Calculate the three-period moving-average forecast for periods 4 through 10.
   3. Calculate the weighted moving average for periods 4 through 10, using weights of .65 .25, and .10, with 0.65 applied to the most recent data.

Month	Demand
1	55
2	61
3	71
4	77
5	88
6	100
7	109
8	122
9	126
10	126

2. Calculate forecasting errors.
   1. Calculate the mean absolute deviation (MAD) for each forecasting procedure above.
   2. Calculate the cumulative sum of forecast error (CFE) for each forecasting procedure above.
   3. Which forecasting procedure would you select? Why?