: Ali's parents have decided to help him pay his college fees. If you know that he will go to college in 6 years and the college costs $4000 per year for 5 years, that are paid upfront each year. How much must they invest now to pay his college fees, if the annual interest rate is 10%? 1. $4,000 2. $4,366 3. $16,679 4. $9,415