A popular brand of tennis shoe has had the following demand history by quarters over a three$-$year period.Determine the seasonal factors for each quarter.Based on the result of part $($a$),$ determine the deseasonalized demand series.Predict the demand for each quarter of Year $4$ for the deseasonalized series from a six$-$quarter moving average.Using the results from parts $($a$)$ and $($c$),$ predict the demand for the shoes for each quarter of Year $4.$