Metro Food Vending operates vending machines in office

Metro Food Vending operates vending machines in office buildings, col­leges, and other businesses around town, and it operates vending trucks for building and construction sites. It has accumulated the following data for sandwich sales during the past 4 years:

1. Forecast demand for 2009 by using a linear trend line estimate for sales in 2009. (Use a centered 4-period moving average.)
2. Analyze the seasonal pattern of the data. What are your seasonal estimates for 2009?
3. Analyze the cyclical pattern of the data? Graphically show this.
4. Based upon your analysis, what would you advise Metro Food vending for 2009?