a$)$ Forecast the demand for Period $8$ using a$$ two$-$period simple moving average.

The forecasted demand for Period $8$ using a$$ two$-$period simple moving average is

$$

$13.$

$($Type an integer or a decimal. Do not$$ round.$)$

Part $2$

$$b$)$ Calculate the MAD for the forecast in part a$.$

MADequals

$$

$4\mathrm{.}3$

$($Round to three dec