a. Compute four-week and five-week moving averages for the time series. Round your answers to two decimal places.

b. Compute the MSE for the four-week and five-week moving average forecasts. Round your intermediate calculations and final answers to two decimal places.

MSE for four-week moving average = _____

MSE for five-week moving average = _____
 
 

Refer to the gasoline sales time series data in the given table. Sales (1000s of Week gallons) 1 17 22 18 4 22 17 15 7 20 8. 19 9 21 10 19 11 14 12 22 2. 3.