forecasts and actual sales of digital music players at Just Say Music are as follows:

Month

Forecast

Actual Sales

March

$150$

$170$

April

$220$

$229$

May

$205$

$192$

June

$256$

$241$

July

$250$

$238$

August

$260$

$210$

September

$270$

$225$

October

$280$

$179$

Plot the data on a spreadsheet and provide insights about the time series.

What is the forecast for November, using a two$-$period moving average?

What is the forecast for November, using a three$-$period moving average?