Auto sales at Carmen's Chevrolet are shown below. Develop a 3-week moving average forecast for weeks 47 Ft+1=nt=1nDt+1i Problem 3 Carmen's decides to forecast auto sales by weighting the three weeks as follows: Calculate the weighted moving average forecast for weeks 47. Ft+1=i=1nWt+1iDt+1i A firm uses simple exponential smoothing with =0.1 to forecast demand. The forecast for the week of January 1 was 500 units, whereas the actual demand turned out to be 450 units. Calculate the demand forecast for the week of January 8. Problem 5 Exponential smoothing is used to forecast automobile battery sales. Two values of are examined: =0.8 and =0.5. Evaluate the accuracy of each smoothing constant. Which is preferable? (Assume the forecast for January was 22 batteries.) Actual sales are given below. Ft+1=Dt+(1)FtMAD=nFEt