Use the following information to answer Questions 19 to 21. You are considering investing in one or both of two securities, X and Y, and are given the following information: Security Possible Return (%) -10 8 15 Probability 0.2 0.6 0.2 Y 4 6 10 0.25 0.4 0.35 19. What is the expected return for security X? a. 9.8% b. 11.0% c. 5.8% d 4.3% I 20. What is the expected return for a portfolio combining 30% of X and 70% of Y? a. 6.9% b. 6.13% c. 6.35% d. 6.57% 21. What is the expected risk of security Y? a. 2.41% b. 5.79% c. 18.83% d. 8.00%