please solve these questions

Problem 7: Passenger miles flown on Northeast Airlines, a commuter firm serving the Boston hub, are shown for the past 12 weeks: Week 1 2 3 4 5 6 7 8 9 10 11 12 Actual Passenger Miles (in Thousands) 17 21 19 23 18 16 20 20 18 22 15 22 (a) Assuming an initial forecast for week 1 of 17,000 miles, use exponential smoothing to compute miles for weeks 2 through 12. Use a = 2 (b) What is the MAD for this model? (e) Compute the Cumulative Forecast Errors and tracking signals. Are they within acceptable limits