An investor has a portfolio consisting of holding in nine stocks. The end-of-year returns over the previous year are; -5.0, 25.4, 4.8, -3.7, 0.9, 6.2, 8.9, 11.2, 18.6 a) Compute the summary statistics (mean, median, MAD, S, and Z-scores) b) Briefly comment on the summary statistics c) Just before the close of business in the last trading session of the year, the company that has reported the 5.0 drop in returns declares bankruptcy, so the return becomes -100 percent. Compute the summary statistics again and comment on your findings