Time Series Analysis and Forecasting”: Exercises 20.47, 20.48, 20.49, 20.50, and 20.51 Time Series Analysis and Forecasting”: Exercises 20.47, 20.48, 20.49, 20.50, and 20.51 Question Time Series Analysis and Forecasting”: Exercises 20.47, 20.48, 20.49, 20.50, and 20.51Gradign CriteriaPlotted 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 fore casted revenues for the next four quarters.