B$)$ Based upon previous demand:

Month Demand

$\backslash$table$[[1,8],[2,12],[3,7],[4,9],[5,15],[6,11],[7,10],[8,12]]$

Compute a $3$ month moving average for months $4-9.$

Don' Compute a $3$ month weighted moving average for months $4-9$ using the weights of $\mathrm{.}55,\mathrm{.}33,\mathrm{.}12($with the most recent month first$).$

$\backslash$table$[[$Month Demand,$],[1,8],[2,12],[3,\frac{7}{9}$