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Total absolute error$/$forecasts $=\frac{17}{4}.$

Question $2$

$\backslash$table$[[$Week$,$Sales$],[,1],[,2],[,3],[,4],[,5],[,6]]$

For the time series above, using exponential smoothing with smoothing constant $=0\mathrm{.}2$ to forecast Week $4$ sales, we get:

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$0\mathrm{.}2($Prior Actual Value$)+0\mathrm{.}8($Prior Forecast$)$

Question $3$

$77F$

Sunny

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