How do I solve C: years 1-6 ?

Year Forecast 1 41.0 2 43.4 3 47.4 4 50.1 5 52.5 6 55.2 For the forecast made using exponential smoothing with a = 0.60 and the given forecast for year 1, MAD = 4.9 surgeries (round your response to one decimal place). Using exponential smoothing with a 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): Year 1 Forecast 1 41.0 2 44.6 3 49.5 4 51.8 5 53.8 6 56.7 For the forecast made using exponential smoothing with a = 0.90 and the given forecast for year 1, MAD = 3.3 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): Year Forecast 4 49 5 52 6 54.3 For forecasts made using a 3-year moving average, MAD = 5 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): Year Forecast Forecast 1 0 2 0 3 0 4 0 5 0 6 0