Suppose we have a time series data, and we want to build 3 Linear Exponential Smoothing Model to make predictions. Alpha and beta we used are alpha = 0.5. beta = 0.1. Please ll in all the blanks in the following table. Please round your results to 2 decimal places. Period Trend Forecast Error 1 15 2 17 3 19 4 20 19.00 . -1.00 5 21 20.50 -1.45 6 .2173 1.33 23.30 -1.33 3 .2533 1.37 27.17 -3.17 9 27.33 1.33 23.94 1.33