An investor purchases one municipal and one corporate bond that pay rates of return of 7.2% and 9.1%, respectively. If the investor is in the 12% marginal tax bracket, his or her after-tax rates of return on the municipal and corporate bonds would be and respectively. Multiple Choice 7.2%; 9.1% 7.2%; 8,008% 6.12%; 7.735% 8.471%; 9.1%