5. Assume the total cost of a college education will be $250,000 when your child enters college in 17 years. You presently have $66,000 to invest. What annual rate of interest must you earn on your investment to cover the cost of your child's college education? 6. Question 6: Part 1: At 7.10 percent interest, how long does it take to double your money? Part 2: At 7.10 percent interest, how long does it take to quadruple it