Timmy Tappan is single and had $197,000 in taxable income. Use the rates from Table 2.3. a. Calculate his income taxes. (Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32.) b. 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.) c. What is the marginal tax rate? (Do not round intermediate calculations and enter your answer as