Hello ! i am having trouble in america with finance class and need some help could anyone help here

10. When you purchased your car, you took out a five-year annual-payment loan with an interest rate of 6% per year. The annual payment on the car is $5000. You have just made a payment and have now decided to pay off the loan by repaying the outstanding balance. What is the payoff amount for the following scenarios? a. You have owned the car for one year? b. You have owned the car for four years? 11. You figure that the total cost of college will be $100,000 per year 18 years from today. If your discount rate is 8% compounded annually, what is the present value today of four years of college costs starting 18 years from today? 12. You have decided to buy a perpetual bond. The bond makes one payment at the end of every year forever and has an interest rate of 5%. If the bond initially costs $1000, what is the payment every year