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: 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? Note: For all requirements, do not round intermediate calculations. Round percentage answers to 2 decimal places. Individuals Calndinl v c:mon