please answer. I will give more than two feedbacks

QUESTION 1 Chuck, a single taxpayer, earns $65,000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. Using the U.S. tax rate schedule, how much federal tax will he owe? QUESTION 2 Chuck, a single taxpayer, earns $65,000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. What is his average tax rate? (Carry your answer two decimals, i.e., 20.05) QUESTION 3 Chuck, a single taxpayer, earns $65,000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. What is his effective tax rate? QUESTION 4 Chuck, a single taxpayer, earns $65,000 in taxable income and $10,000 in interest from an investment in City of Heflin bonds. What is his current marginal tax rate