QUESTION 6 Joan and John are twins and in the 22% marginal tax bracket. They both sold stocks for a gain of $15,000 each. How much tax will Joan pay on this gain if she held the stocks for 13 months? QUESTION 7 Joan and John are twins and in the 22% marginal tax bracket. They both sold stocks for a gain of $15,000 each. How much tax will John pay on this gain if he held the stocks for 11 months? QUESTION 10 Mary is an internal medicine doctor who earn $164,500 a year. What is her average tax rate