please answer question clearly.

Campbell, a single taxpayer, earns $400,000 in taxable income and $2,000 in interest from an investment in State of New York bonds. (Use the U.S. Required: a. If Campbell earns an additional $15,000 of taxable income, what is her marginal tax rate on this income? b. What is her marginal rate if, instead, she had $15,000 of additional deductions? Note: For all requirements, do not round intermediate calculations. Round percentage answers to whole percent. Scot and Vidia, married taxpayers, earn $240,000 in taxable income and $5,000 in interest from an investment in City of Tampa bonds. (Use the U.S. or married filing jointly). Required: a. If Scot and Vidia eam an additional $80,000 of taxable income, what is their marginal tax rate n this income? b. What is their marginal tax rate if, instead, they report an additional $80,000 in deductions? Note: For all requirements, round your answers to 2 decimal places. Individuals