The following table shows the past two years of quarterly sales information. Assume that there are both trend and seasonal factors and that the...

The following table shows the past two years of quarterly sales information. Assume that there are both trend and seasonal factors and that the seasonal cycle is one year. Use time series decomposition to forecast quarterly sales for the next year.Quarter: 12345678Sales:160195150140215240205190

Centered Moving Average and Deseasonalization t12345678 Year11112222 Quarter12341234 Sales:160195150140215240205190 Calculation of Seasonal Indexes12310.8922...