Exercise One: Given the following weighted time series, and using your knowledge of forecasting, compute, (a) the three-period weighted moving average, (b) the error of your forecasting, (c) the absolute error, (d) the squared error, (e) the absolute percentage error, (f) using a four-period moving average with arbitrary weights adding to one, repeat steps (a) thru (e), (g) and find the weights that minimize the Mean Absolute Percentage Error in part (f) as shown in class. (Hint: Assume that the sum of the weights equals one in part (9)). Actual Value 14 12 16 Weights 3 2 1 14 Period 1 2 3 4 5 6 7 8 9 10 11 12 5000 18 15 19 16 20 17 22 19