#$9$

Using the data below, what is the simple exponential smoothing forecast for the $3$rd week where $a=0\mathrm{.}3?$

$\backslash$table$[[$Week$,$Time Series Value$],[1,4\mathrm{.}00],[2,4\mathrm{.}00],[3,8\mathrm{.}00],[4,7\mathrm{.}00]]$

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Answer format: Number: Round to: $1$ decimal places.