Problem III $(10$ Points$)$

The Hartley$-$Davis motorcycle dealer in the Minneapolis$-$St$.$ Paul area wants to be able to forecast accurately the demand for the Roadhog Super motorcycle during the next month. From sales records, the dealer has accumulated the$-$ data in the following table for the past year.

A$.$ Compute a three$-$month moving average forecast of demand for April through September

B$.$ Compute the forecast for September using the exponential smoothing technique, considering alpha $\backslash (=0\mathrm{.}3\backslash ).$

C$.$ Determine which on the two methods is the most precise one.