Michael is single and 35 years old. He is a participant in his employer's sponsored retirement plan. How much can Michael contribute to a Roth IRA in each of the following alternative situations? a. Michael's AGl is $56,000 after he contributed $4,300 to a traditional IRA Contribution to Roth IRA b. Michael's AGI is $86,000 before any IRA contributions. Contribution to Roth IRA c. Michael's AGI is $141,000 before any IRA contributions. ontribution to Roth IRA