Compute F$6$ using a three$-$period moving average forecast given demand for shopping carts for the last five periods.

$\backslash$table$[[$Period $(t),$Actual demand $($A$)],[$Week $1,42],[$Week $2,40],[$Week $3,43],[$Week $4,40],[$Week $5,41]]$

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d $41\mathrm{.}66$