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 D 1 3,100 2 3 4 5 4,000 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).