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Sales of tablet computers at Ted Glickman's electronics store in Washington, D.C., over the past 10 weeks are shown in the table below: a) Forecast demand for each week, including week 10, using exponential smoothing with a a=0.5 (initial forecast = 20). Compute the tracking signal. F = F t-1 +off- -F.. Forecast based on exponential smoothing {-1 t-1 Cumulative Error Tracking signal = MAD (Actual demand in period i - Forecast demand in period 1) |Actual - Forecast 22 (MAD_ElActual-Forecast), Error Jerror! Forecast 20 (given) 1 Week 1 2 3 4 5 6 7 8 9 10 Sales 20 21 28 37 25 29 36 22 25 28