16.37 The data file Product Sales shows 24 annual observations on sales of a product. Use simple exponential smoothing with smoothing constant a = 0.5 to obtain forecasts of sales for the next 3 years.

16.38 Refer to the data file Bank Assets. Use the Holt-

Winters seasonal method with smoothing constants a = 0.7, b = 0.1, and g = 0.5 to obtain forecasts of the bank’s total asset series for the next four quarters.