4 01:57:14 Duela Dent is single and had $180,000 in taxable income. Use the rates from Table 2.3. a. What is the average tax rate? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the marginal tax rate? (Enter your answer as a percent rounded to the nearest whole number, e.g., 32.) a. Average tax rate. % b. Marginal tax rate %