please answer each part!

Refer to the gasoline sales time series data in the given table. (a) Compute four-week and five-weck moving averages for the time series. Do not round intermediate calculations. If required, round your answers to two decimal places. (b) Compute the MSE for the four-week and five-week moving average forecasts. Do not round intermediate calculations. If required, round your answers to two decimal places, MSE for four-week moving average = MSE for five-week moving average = (c) What appears to be the best number of weeks of past data (three, four, or flve) to use in the moving average computation? Consider that the MSE for the three-week movina average is 12.667. - Select your answer- Three Four Five Check My Work (1 remaining)