Compute a three$-$period moving average forecast given demand for shopping carts for the last five periods. $($Round all your answe to two decimal points.$)$

$\backslash$table$[[$Period$,$Demand$],[1,42],[2,40],[3,45],[4,39],[5,48]]$

Answer is complete but not entirely correct.

$\backslash$table$[[],[$Forecast Period $4,41\mathrm{.}33ox$