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Smooth out the following time series data of quarterly car sales using a 4 year moving average. Deseasonalize the car sales data and forecast the

Smooth out the following time series data of quarterly car sales using a 4 year moving average. Deseasonalize the car sales data and forecast the sales for year 3. Sales (mom = 4.1 6-0 6.5 = 5.8 = 5.2 6-8 7.4

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