just need help with c please

Sales of tablet computers at Ted Gickman's electronics store in Washington, D.C. over the past 10 weeks are shown in the table below Woek 1 2 3 4 5 6 7 8 9 10 Demand 19 21 27 37 26 30 37 20 26 28 a) The forecast for weeks 2 through 10 using exponential smoothing with = 0.60 and a week 1 initial forecast of 19.0 are (round your responses to two decimal placea) Week 1 2 3 4 5 6 7 8 9 10 Demand 19 21 27 37 26 30 37 20 26 28 Forecast 19.0 19.00 20 20 24 28 31 91 2836 29.35 33.94 2558 25 83 b) For the forecast developed using exponential smoothing (a=0 60 and initial forecast 19.0% the MAD - 533 sales (round your response to two decimal places) c) For the forecast developed using exponential smoothing (a = 0 60 and initial forecast 190) the tracking signal round your response to no decimal places)