Average starting salaries for students using a placement service at a university have been steadily increasing. A study of the last four graduating classes indicates the following average salaries: $20,000, $22,000, $23,000, and $25,000 (last graduating class). Predict the starting salary for the next graduating class using an exponential smoothing model with an alpha value of 0.2. Assume that the initial forecast was $20,000 (so that the forecast and the actual were the same). a) $21,536 b) $21,736 c) $20,176 d) $21,936 e) None of the above