Jackson and Ashley Turner (both 45 years old) are married and want to contribute to a Roth IRA for Ashley. In 2017, their AGI is $189,400. 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? Jackson and Ashley Turner (both 45 years old) are married and want to contribute to a Roth IRA for Ashley. In 2017, their AGI is $189,400. Jackson and Ashley each earned half of the income. (Leave no answer blank. Enter zero if applicable.) 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?