$\backslash$table$[[$Year$,1,2,3,4,5],[$Mileage$,3,100,4,000,3,450,3,800,3,700]]$

a$)$ Using a $2-$year moving average, the forecast for year $6=3750$ 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 $=83\mathrm{.}3$ miles $($round your response to one decimal place$).($Hint: You will have only $3$ years of matched data.$)$

d$)$ Using exponential smoothing with $=0\mathrm{.}20$ and the forecast for year $1$ being $3,100,$ the forecast for year $6=3469$ miles $($round your response to the nearest whole number$).$

Can you show step by step how they got the answer?