Question 18 (2.5 points) Your investment has a 25% chance of earning a 15.0% rate of return, a 50% chance of earning a 10.0% rate of return, and a 25% chance of losing 3.0%. What is the standard deviation of this investment? 7.2% 8.4% 7.9% 6.7% Next Page Page 20 of 40 Question 20 (2.5 points) You invest $1,000 in a complete portfolio. The complete portfolio is composed of a risky asset with an expected rate of return of 10.0% and a standard deviation of 20% and a Treasury bill with a rate of return of 4.0%. A portfolio that has an expected value in 1 year of $1,060 could be formed if you place 66.66% of your money in the risky portfolio and the rest in the risk-free asset place 55.55% of your money in the risky portfolio and the rest in the risk-free asset place 44.45% of your money in the risky portfolio and the rest in the risk-free asset place 33.34% of your money in the risky portfolio and the rest in the risk-free asset