2.3 An investor has a portfolio consisting of holdings in nine stocks (Returns.xlsx). The end- of-year returns over the previous year are, in increasing order, -5.0, 3.7,0.9, 4.8, 6.2, 8.9, 11.2, 18.6, 25.4. a. Compute the summary statistics (mean, median, MAD, and S). b. Just before the close of business in the last trading session of the year, the company that had reported the 5.0 percent drop declares bankruptcy, so the return becomes -100 per- cent. Recompute the results, and comment on your findings. c. Are simple summary statistics relevant to this investor? How would you modify the calculations, if at all