How do I calculate the MAD using the trend projection?

For the forecast made using exponential smoothing with =0.60 and the given forecast for year 1,MAD=3.8 surgeries (round your response to one decimal place). Using exponential smoothing with of 0.90 and the given forecast for year 1 , the forecasts for years 2 through 6 are (round your responses to one decimal place): For the forecast made using exponential smoothing with =0.90 and the given forecast for year 1,MAD= surgeries (round your response to one decimal place). b) Forecasts for years 4 through 6 using a 3-year moving average are (round your responses to one decimal place): For forecasts made using a 3-year moving average, MAD =4.2 surgeries (round your response to one decimal place). c) Forecasts for years 1 through 6 using the trend-projection method are (round your responses to one decimal place): For forecasts made using the trend-projection method, MAD= surgeries (round your response to one decimal place)