a) The forecast for weeks 2 through 10 using exponential smoothing with a = 0.55 and a week 1 initial forecast of 19.0 are (round your responses to two decimal places): Week 1 Demand 19 Forecast 19.0 2 23 3 4 5 6 7 8 9 10 29 36 26 30 36 24 25 28 21.20 25.49 31.27 28.37 29.27 33.13 27.88 26.30 19 b) For the forecast developed using exponential smoothing (a = 0.55 and initial forecast 19.0), the MAD = 4.96 sales (round your response to two decimal places). c) For the forecast developed using exponential smoothing (a = 0.55 and initial forecast 19.0), the tracking signal = (round your response to two decimal places)