Jackson and Ashley Turner (both 45 years old) are married and want to contribute to a Roth IRA for Ashley. In 2015, their AGI is $189,000. Jackson and Ashley each earned half of the income. (Leave no answer blank. Enter zero if applicable.)

a. How much can Ashley contribute to her Roth IRA if they file a joint return?

c. Assume that Ashley earned all of the couples income and that she contributed the maximum amount she is allowed to contribute to a Roth IRA. What amount can be contributed to Jacksons Roth IRA if they file a joint return?