An investor purchases one municipal bond and one corporate bond that pay rates of return of 9% and 10.5%, respectively. If the investor is in the 20% tax bracket, his after-tax rates of return on the municipal and corporate bonds would be, respectively, Multiple Choice 7.20% and 10.5% 10.80% and 8.40% 9% and 10.5% 9% and 8.40%