Shanken Corp. issued a 30-year, 6 percent semiannual bond 3 years ago. The bond currently sells for 92 percent of its face value. The company's tax rate is 35 percent. a. What is the pretax cost of debt? (Do not round intermediate calculation and round your answer to 2 decimal places. (e.g., 32.16)) Cost of debt % b. What is the aftertax cost of debt? (Do not round intermediate calculations and round your answer to 2 decimal places. (e.g., 32.16)) Cost of debt tes c. Which is more relevant, the pretax or the aftertax cost of debt? Aftertax cost of debt O Pretax cost of debt