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: Week 1 2 3 4 5 6 7 8 9 10 Demand 21 23 29 36 26 29 35 24 25 29 a) The forecast for weeks 2 through 10 using exponential smoothing with a 0.60 and a week 1 initial forecast of 21.0 are (round your responses to two decimal places): Week 1 2 3 4 5 6 7 8 9 10 Demand 21 23 29 36 26 29 35 24 25 8.78 32.51 27.40 25.90 Forecast 21.0 21.00 22.20 26.38 32.15 28.46 28.78 32.51 27.40 25.96 b) For the forecast developed using exponential smoothing (x = 0.60 and initial forecast 21.0), the MAD = 4.54 sales (round your response to two decimal places). c) For the forecast developed using exponential smoothing (a = 0.60 and initial forecast 21.0), the tracking signal = 2.49 (round your response to two decimal places).