Jorge and Anita, married taxpayers, earn $150,000 in taxable income and $40,000 in interest from an investment in City of Heflin bonds. (Use the U.S. tax rate schedule). (Do not round intermediate calculations. Round your answers to 2 decimal places.)

a. If Jorge and Anita earn an additional $100,000 of taxable income, what is their marginal tax rate on this income?

b. What is their marginal rate if, instead, they report an additional $100,000 in deductions?