moving average forecast for week $4$ for Small Town Restaurant $($see downloaded file for actual demand$)?$

$MA=\frac{{\displaystyle \underset{?}{\overset{?}{}}}\text{D}\text{e}\text{m}\text{a}\text{n}\text{d}in\text{P}\text{r}\text{e}\text{v}\text{i}\text{o}\text{u}\text{s}n\text{P}\text{e}\text{r}\text{i}\text{o}\text{d}\text{s}}{n}$