9. An investor purchases one municipal bond and one corporate bond that pay rates of retum of 4.8% and 7.4%, respectively. If the investor is in the 23% tax bracket, his after- tax rates of return on the municipal and corporate bonds would be respectively, and 10. Your investment has a 5% chance of earning -45% rate of return, a 25% chance of earning a 10% rate of return, a 25% chance of earning a 15% rate of return, a 25% chance of earning a 20% rate of return, and a 20% chance of earning 100%. What is the standard deviation of this investment