4. Kirby made contributions to a Roth IRA over the course of 35 working years. His contributions averaged $2,000 annually. Kirby was in the 26% tax bracket during his working years. The average annual rate of return on the account was 5%. Upon retirement, Kirby stopped working and making Roth IRA Contributions. Instead, he started living on withdrawals from the retirement account. At this point, Kirby dropped into
the 15% tax bracket. Factoring in taxes, what is the effective value of Kirby's Roth IRA at retirement? Assume annual compounding, (3 points)
O $170,140.61
O $172,940.61
O 5162,440.61
O $133,674.05