4. Kevin made contributions to a Roth IRA over the course of 40 working years. His contributions averaged $3,000 annually. Kevin was in the 25% tax bracket during his working years. The average annual rate of return on the account was 7%. Upon retirement, Kevin stopped working and making Roth IRA contributions. Instead, he started living on withdrawals from the
retirement account. At this point, Kevin dropped into the 15% tax bracket. Factoring in taxes, what is the effective value of Kevin's Roth IRA at retirement? Assume annual compounding. (3
points)
O $449,179.01
O $568,905.34
O $580,905.34
0 5586,905.34