questions 1-4 please

1. You put $120 in an account that pays 2.5% simple interest. a. How much would you make in interest at the end of 18 months? b. How much would be in your account at the end of 18 months? 2. You borrow $300 from a friend and pay her back $381 after 2.5 years what was the simple interest rate? 3. You need $1800 six years from now. a. How much should deposit in an account now at 9% compounded quarterly to reach that goal? b. How much would you have made in interest at the end of the 6 years? 4. You deposit $50 each month in an account that pays 4.2% compounded monthly. a. How much is in in your account after 10 years? b. How much did you make in interest after the 10 years