Time Series Analysis and Forecasting”: Exercises 20.47, 20.48, 20.49, 20.50, and 20.51

Gradign Criteria
Plotted the time series accurately.
Discussed why exponential smoothing is not recommended as a forecasting tool in situation.
Used regression analysis to determine the trend line.
Determined the seasonal indexes accurately.
Accurately forecasted revenues for the next four quarters.