Solve the following problem and show your work and calculations, when possible interpret the solution. You may use calculator, Minitab or Excel. Create a single file with the solution word and upload it in the BB provided space.

1. A popular brand of tennis shoe has had the following demand history by quarters over a three-year period.

Year 1	Demand	Year 2	Demand	Year 3	Demand
1	13	1	16	1	14
2	25	2	32	2	35
3	76	3	71	3	74
4	52	4	62	4	57

1. Determine the seasonal factors for each quarter.
2. Based on the result of part (a), determine the deseasonalized demand series.
3. Predict the demand for each quarter of Year 4 for the deseasonalized series from a six-quarter moving average.