4. Consider the GoodSound Music Company problem presented in Exercise #2. The quarterly sales data are shown below: Total YearQuarter Quarter 2 Quarter 3 Quarter 4 Yearly Sal 6 10 12 18 12 28 34 50 76 14 16 7 13 10 35 a. Compute the seasonal indexes for the 4 quarters. b. When does GoodSound Music experience the largest seasonal effect? Does this appear reasonable? Explain. c. Deseasonalize data, and use the deseasonalized time series to identify the trend Use the results to forecast for next year. 4. Consider the GoodSound Music Company problem presented in Exercise #2. The quarterly sales data are shown below: Total YearQuarter Quarter 2 Quarter 3 Quarter 4 Yearly Sal 6 10 12 18 12 28 34 50 76 14 16 7 13 10 35 a. Compute the seasonal indexes for the 4 quarters. b. When does GoodSound Music experience the largest seasonal effect? Does this appear reasonable? Explain. c. Deseasonalize data, and use the deseasonalized time series to identify the trend Use the results to forecast for next year