Calculate three forecasts using the following data. first, for periods 4 through 10, develop the exponentially smoothed forecasts using a forecast for period 3 (f3) of 120.0 and an alpha of 0.3. second, calculate the three-period moving-average forecast for periods 4 through 10. third, calculate the regression forecast for periods 4 through 10. calculate the mean absolute deviation (mad) for each forecasting procedure. which forecasting procedure would you select? why? month demand 1 120 2 115 3 125 4 119 5 127 6 114 7 120 8 124 9 116 10 137