Please answer both questions

1. Assume that the total cost of a college education will be $345,000 when your child enters college in 18 years. You presently have $73,000 to invest. What annual rate of interest must you earn on your investment to cover the cost of childs college education?

2. You are trying to save to buy a new $245,000 Ferrari. You have $50,000 today that can be invested at your bank. The bank pays 4.3% annual interest on its accounts. How long will it be before you have enough to buy the car?