5. Which of the following taxes are regressive? (There may be more than one correct answer. Circle all that apply.) A) Indiana state sales tax B) Indiana state income tax C) Federal income tax D) Social security tax 6. Which of the following taxes are proportional? (There may be more than one correct answer. Circle all that apply.) A) Indiana state sales tax B) Indiana state income tax C) Federal income tax D) Social security tax 7. Calculate the federal income tax liability (taxes paid) in 2016 for a single individual earning $30,000 in taxable income. Use the marginal tax rates from the presentation or IRS Form 1040 ES