The Carbondale Hospital is considering the purchase of a new ambulance. The decision will

The Carbondale Hospital is considering the purchase of a new ambulance. The decision will rest partly on the anticipated mileage to be driven next year. The miles driven during the past 5 years are as​ follows:
Year 1 2 3 4 5
Mileage 3,100 3,950 3,450 3,850 3,700
a) Using a​ 2-year moving​ average, the forecast for year 6​ = ? miles ​(round your response to the nearest whole​number).
b) If a 2-year moving average is used to make the forecast, the MAD based on this (round your response to one decimal place). (Hint: You will have only 3 years of matched data.)?
c)The forecast for year 6 using a weighted 2-year moving average with weights of 0.40 and 0.60 (the weight of 0.60 is for the most recent period) = miles (round your response to the nearest whole number).?The MAD for the forecast developed using a weighted 2-year moving average with weights of 0.40 and 0.60 (round your response to one decimal place). (Hint: You will have only 3 years of matched data.)?
d) Using exponential smoothing with alpha ? 0.30 and the forecast for year 1 being 3,050, the forecast for year 6 (round your response to the nearest whole number).?