b. Calculate the exponential smoothing with trend forecast for these data using an ? of 0.20, a ? of 0.30, an initial trend forecast ( T1?1 ) of 1.00, and an initial exponentially smoothed forecast ( F1?1 ) of 31.
Note: Round your intermediate calculations and answers to 2 decimal places.
c. Calculate the mean absolute deviation (MAD) for the last nine months of forecasts.
Note: Round your intermediate calculations and answers to 2 decimal places.