03.(17.5] Sales of latest hatchback at a local automobile dealership over the past 4 days have been the following: Period Sales 30 31 35 32 1. Show all period forecasts, using exponential smoothing with alpha of 0.2 and initial forecast for period I as 32, the forecast for the period demand is 2. Compute the MAD for the above data for all periods, the period MAD is --------- 3. Compute the TS-tracking signal for all periods, the 4th period TS is Does the model need any change? -------- (yeso). Why or why not? 1 2 3 4