Robin wants to retire as soon as she has enough money invested in a special bank account (paying 14 percent interest, compounded annually) to provide her with an annual income of $25 000. She is able to save $10 000 per year, and the account now holds $5000. If she just turned 20, and expects to die in 50 years, how old will she be when she retires? There should be no money left when she turns 70