Check my work 2 Chuck, a single taxpayer, earns $75,000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. (Use the U.S. tax rate schedule) Required: 10 points a. If Chuck earns an additional $40,000 of taxable income, what is his marginal tax rate on this income? eBook b. What is his marginal rate if, instead, he had $40,000 of additional deductions? Print (For all requirements, do not round intermediate calculations. Round your answers to 2 decimal places.) References Marginal tax rate a % Marginal tax rate %