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a$)$ Forecast the mileage for next year $(6$th year$)$ using a $2-$year moving average.

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a$)$

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b$)$ Find the MAD based on the $2-$year moving average. $($Hint: You will have only $3$ years of matched data.$)$

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c$)$ Use a weighted $2-$year moving average with weights of $.4$ and $6$ to forecast next year's mileage. $($The weight of $6$ is for the most recent year.$)$ What MAD results from using this approach to forecasting? $($Hint: You will have only $3$ years of matched data.$)$

d$)$ Compute the forecast for year $6$ using exponential smoothing, an initial forecast for year $1$ of $3,000$ miles, and $=..$ Px

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a$)$

b$)$

$4\mathrm{.}6$ The monthly sales for Yazici Batteries, Inc., were as

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