33. [LO 4,4] Jennifer, age 35, is single and an active participant in her employer's qualified retirement plan. Compute the maximum Roth IRA contribution that she can make in 2019 if a. her adjusted gross income is $140,000. b. her adjusted gross income is $59,000. c. her adjusted gross income is $38,000 and she makes a $2,000 contribution to a traditional IRA