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. tax rate schedule). 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? (For all requirements, do not round intermediate calculations Chdpter 1Homewor3 Saved Save &Exit Help Check r Jorge and Anita, married taxpayers, earn $150,000 in taxable income and $40.000 in interest from an investment in City of Heflin bonds Using the US tax.rate schedule for marrmied fang jointly, how much federal tax will they owe? What is their average tax rate? What is their effective tax rate? What is their current marginal tax rate? (Round your answers to 2 decimal oleces 4 29 4