please help and explain

Scot and Vidia, married taxpayers, earn $241,000 in taxable income and $5,000 in interest from an investment in City of Tampa bonds. (Use the U.S. tax rate schedule for married filing jointly.) Required: a. If Scot and Vidia earn an additional $81,000 of taxable income, what is their marginal tax fate on this income? b. What is their marginal tax rate if, instead, they report an additional $81,000 in deductions? Note: For all requirements, do not round intermediate calculations. Round your answers to 2 decimal places