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 comma 100 4 comma 050 3 comma 450 3 comma 750 3 comma 800 ​a) Using a​ 2-year moving​ average, the forecast for year 6​ = 3775 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​ = 108.3 miles ​(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) = nothing miles ​(round your response to the nearest whole​ number).