For 2019, Chanda is 36, single, and an active participant in a qualified employee pension plan. Determine the maximum Roth IRA contribution that she can make in each of the following cases: If an amount is zero, enter "O". a. Assume that she did not make any contributions to other IRA accounts during the year. When her adjusted gross income for the year is $66,000, Chanda is allowed to contribute $ to her Roth IRA. b. When her adjusted gross income for the year is $125,000, Chanda is allowed to contribute $ to her Roth IRA. c. When her adjusted gross income for the year is $139,000, Chanda allowed to contribute $ to her Roth IRA. to d. When her adjusted gross income for the year is $65,000, and she makes a $3,500 contribution to a deductible IRA account, Chanda is allowed to contribute $ her Roth IRA