Data collected for yearly registration in an elective engineering seminar are shown m the following table: a. Develop a 3-year moving average to forecast registrations from year 4 to year 8. b. Estimate demand again for years 4 to 8 with a 3-year weighted moving average in which registrations in the most recent year are given a weight of 2. and registrations in the other 3 years each given a weight of 1 Year 1 Demand 3-year moving avernge 3-year Weighted moving average 1 2 3 4 5 6 7 6 4 3 10 11 7 8 For the same data, a. use exponential smoothing with a = 0.3 to forecast registrations. To begin, assume that the forecast for year 15 students. b. What is the MAD? Year 1 Exponential Smoothing Demand -0.3 4 forecasting error 6 3 4 4 3 5 10 6 8 7 17