Can someone help me figure out part C?

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 Mileage 2 4,000 4 5 3,050 3,500 3,800 3,750 a) Using a 2-year moving average, the forecast for year 63,775 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 have only 3 years of matched data.) 58.3 miles (round your response to one decimal place). (Hint: You will c) The forecast for year 6 using a weighted 2-year moving average with weights of 0.45 and 0.55 (the weight of 0.55 is for the most recent period)miles (round your response to the nearest whole number)