Duela Dent is single and had $189,000 in taxable income. Use the rates from Table 2.3. a. What is the average tax rate? (Do not round intermediate calculations and round your answer to 2 decimal palces, e.g., 32.16.) b. What is the marginal tax rate? (Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32.) a. Average tax rate b. Marginal tax rate % % Duela Dent is single and had $189,000 in taxable income. Use the rates from Table 2.3. a. What is the average tax rate? (Do not round intermediate calculations and round your answer to 2 decimal palces, e.g., 32.16.) b. What is the marginal tax rate? (Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32.) a. Average tax rate b. Marginal tax rate % %