ItablellYear, $1,2,3,4,5].|$

Mileage

$,3,100,3,950,3,400,3,850,3,700$

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 $=125$

miles $($round your

response to one

decimal place$).($Hint

You will have only $3$