Based on the following data for the past $10$ months, the operation manager of the company wants to be certain that enough cars are available to deliver orders.

$\backslash$table$[[$Month$,$Jan.,Feb.,Mar.,Apr.,May.,Jun.,Jul.,Aug.,Sep.,Oct.$],[$Orders$,120,90,100,75,110,50,75,130,110,90]]$

Plot the above data

Compute the demand forecast for Aug. through Oct using a three$-$month weighted moving average. Use weights of $0\mathrm{.}5,0\mathrm{.}17,$ and $0\mathrm{.}33,$ with the heavier weights in recent months.

Compute the demand forecast for Aug. through Oct. Use $2$ MONTH MOVING AVERAGE

Which Method is much better? Why

Given $TS+-2$ and by using the $2MA(2$ Moving Average$)$ method the $TS+-4?$ Do you agree or disagree to use it next time? Why

Which Methods can be used to forecast December car sales?

Explain. $R$ between the Car Sales and the advertising fees is $-\mathrm{.}80$