3?. 38. a) Determine onestepahead forecasts for periods 4 and B using threeperiod moving averages method. b} Let us assume that the forecast for period 1 was 20D. Also suppose that o = 111. Determine one-step-ahead forecasts for periods 2 and B. c} lCompare the above mentioned methods for the periods 4 and 8. Based on this comparison conclude which method is a superior method for the given series. Bicycle sales at TT's Bikes are shown below. Actual eek Bicycle Sales 3 1D '3 11 1D 13 2 mm-hLHMIl a} Use 3week moving average for forecasting week 4, week 5, week 6 and week 2. b} If Weights Applied Period 3 last week 2 2 weeks ago 1 3 weeks ago Forecast the weeks 4, 5, 6 and F. c]: Which method wouid you prefer and why? d} Use exponential smoothing to forecast hike sales. Assume that the forecast for week 1 was 9 and o = 0.3". The sales manager of a large apartment rental complex feels the demand for apartments may be related to the number of newspaper ads placed during the previous month. She has collected the data shown in the accompanying tahle. Ads Purchased Apartments leased 6 15 SI 4 4D 16 20 El 25 13 25 9 15 1D 35 15