Forecasts and actual sales of portable mp$3$ players at Just Say Music are as follows:

Month Forecast Sales Actual Sales

March $150170$

April $220229$

May $205192$

June $256241$

July $250238$

August $260210$

September $270225$

October $280179$

Plot the data and provide insights into the time series.

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

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