E 10.24. The choice of the smoothing constants, \\( \\alpha \\) and \\( \\beta \\), has a considerable effect on the accuracy of the forecasts obtained by using exponential smoothing with trend. For each of the following time series, set \\( \\alpha=0.2 \\) and then compare MAD obtained with \\( \\beta=0.1,0.2,0.3,0.4 \\), and 0.5 . Begin with initial estimates of 50 for the average value and 2 for the trend