ary is 2 years old and earned $10,000 in interest income orn funds given to her by her grandparents. Mary's Parents are in the 25% marginal federal income tax bracket. Mary's Grandparents are in the 33% Marginal Income Tax Bracket a. Calculate Mary's 2017 taxable income. b. Calculate Mary's 2017 federal income tax. c. Calculate Mary's 2017 federal income tax if the $ 10,000 were qualified dividend income instead of interest income