The Carbondale Hospital $is$ considering the purchase $of$ a new ambulance. The decision will rest partly $on$ the anticipated mileage $tobe$ driven next year. The miles driven during the past $5$ years are $as$ follows:

Year

$1$

$2$

$3$

$4$

$5$

Mileage

$3$ comma $050$

$4$ comma $000$

$3$ comma $500$

$3$ comma $850$

$3$ comma $800$

Part $2$

a Using $a2-$year moving average, the forecast for year $6=$