Timmy Tappan is single and had $170,110 in taxable income. Use the tax rates from Table 2.3. a. What are his income taxes? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. What is his average tax rate? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c. What is his marginal tax rate? (Do not round intermediate calculations and enter your answer as a percent.)