Individuals Schedule X-Single Chuck, a single taxpaver, earns $75.000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. (Use the Us Required: a. If Chuck cams an additional $40.000 of taxable income, What is his narginal tax fate on this income? b. What is his marginal rate if, instead, he had $40.000 of additional deductions? Note: For all requirements, do not round Intermedlate calculations. Round percentoge answers to 2 decimal places