0 Required information [The following information applies to the questions displayed below.] John (age 53 and single) has earned income of $3,300. He has $30,300 of unearned (capital gain) income. a. If he does not participate in an employer-sponsored plan, what is the maximum deductible IRA contribution John can make in 2018? Maximum deductible IRA contribution b. If he does participate in an employer-sponsored plan, what is the maximum deductible IRA contribution John can make in 2018? Maximum deductible IRA contribution c. If he does not participate in an employer-sponsored plan, what is the maximum deductible IRA contribution John can make in 2018 if he has earned income of $12,800? Maximum deductible IRA contribution