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Auto sales at Carmen's Chevrolet are shown below: Develop a 3-week moving average. Carmen's decides to forecast auto sales by weighting the three weeks as follows: Carmen's uses simple exponential smoothing with alpha = 0.1 to forecast demand. The forecast for the week of January 1 was 15 units whereas the actual demand turned out to be 13 units. Calculate the demand forecast for the week of January 8