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:

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 $=,$ 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 $0\mathrm{.}40$ and $0\mathrm{.}60($the weight of $0\mathrm{.}60$ is for the most recent period$)=$

miles $($round your response to the nearest whole number$).$