$2-$ Using the data from problem $1,$

A$)$ Compute an exponentially smoothed forecast with alpha$=0\mathrm{.}80$ through December and create a

forecast for the next month, January. Use initial forecast of $908$ for January. Find MAD.

B$)$ Compute an exponentially smoothed forecast with alpha$=0\mathrm{.}60$ through December and create a

forecast for the next month, January. Use initial forecast of $908$ for January. Find MAD.

C$)$ Compare the forecasts you computed by using an exponential smoothing model from part a and

b$.$ Which forecasting model does a better job?