The stock price on the first day of the month for the Boeing Corporation from January $1970$ to December $2009$ is provides in the spread sheet. In column C we have implemwnted an expoential smoothing model, which is parameterized by tjebinitial estimate of the permanent componet given in Cell D$1$ and the smoothing parameter agiven in cell F$1.$ In column D we give thebone month ahead forcast for the stock procwand then in columns E$,$F$,$G$,$H we calculate the monthly error terms needed to compute MAD, RSME, And MAPE. Use the spreadsheet to find the beat choice of a to one decimalnpoint to minimize MAD