As you can see in the following table demand for heart transplant surgery at General Hospital few years Year. The director of medical services predicted 6 years that demand in year 1 would be 41 surgentes Using Excel a) Use a 3-year moving average to forecast demand in years 2021, 2022, 2023. b)Use exponential smoothing, with a smoothing constant of .6 develop forecasts for years 2019 till 2023. c) Use the trend-projection (regression) method to forecast demand in years 2018 through 2023. d) Compare the results in (a), (b), and (C) to identify the most accurate forecast using Mean Absolute Deviation (MA