Problem 3: Use the data from the following four actions to answer the questions below: Yields Year TLS DI PFE WMT 20x5 12.00% 4.50% 5.80% 11.30% 20x613.30% 5.30% 5.70% 9.00% 20x7 10.20% 3.10% 5.90% 13.90% 20x8 9.30% 2.70% 4.50% | 14.80% 20x9 8.60% 1.90% 6.30% 15.00% c. Calculate the return, risk and coefficient of variation for the portfolio of three stocks selected in the previous exercise. It starts from the premise that there is an investment distribution in equal parts (33.3%) among the selected shares. (10 points) b. Which three of the four stocks would you combine to build a diversified portfolio and why? It starts from the premise that there is an investment distribution in equal parts (33.3%) among the selected shares. (10 points)