Chuck, a single taxpayer, earns $76,700 in taxable income and $11,900 in interest from an investment in City of Heflin bonds. (Use the U.S. tax rate schedule.) Required: a. If Chuck earns an additional $40,000 of taxable income, what is his marginal tax rate on this income? b. What is his marginal rate if, instead, he had $40,000 of additional deductions? (For all requirements, do not round intermediate calculations. Round percentage answers to 2 decimal places.) a. Marginal tax rate b. Marginal tax rate % % ividuals edule X-Single axable income is over: But not over: The tax is: $ 0 $ 9,950 10% of taxable income $ 9,950 $ 40,525 $995 plus 12% of the excess over $9,950 $ 40,525 $ 86,375 $4,664 plus 22% of the excess ovest $40,525 $ 86,375 $ 164,925 $14,751 plus 24% of the excess over $86,375 $164.925 $ 209,425 $33,603 plus 32% of the excess over $164,925 $ 209,425 $ 523,600 $47,843 plus 35% of the excess over $209,425 $ 523,600 $157,804.25 plus 37% of the excess over $523,600