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 2 10 1 21 Demand 23 3 4 5 6 7 8 9 29 25 28 37 22 25 29 22.2 26.28 32.71 28.08 28.03 33.41 26.57 25.63 37 Forecast 21.0 21 28 32.71 28. b) For the forecast developed using exponential smoothing (a = 0.60 and initial forecast 21.0), the MAD = 5.26 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 = (round your response to two decimal places)