im really confused on 5,6,7 am i doing these correctly?

oin 2 = n lnclill (n=7,27 years ted ) ) fv = PMT (a +i)^1) / = aso (C1. 09-09 fv = $12,790.027 ? PU= PMT (1-1 = 220 1-1/4105) cos = 952.484 5. If you save $250 each year for the next 20 years, how much money would you have if you earned 9%? 6. You can afford to pay $222 each month for a car for five years. If your car loan were at 5% then what price car can you afford? 7. Suppose you have $13,500 sitting in an account earning 10%. What will that be worth in 10 years time? What will it be worth if you can also figure out a way to deposit $1,000 each year for the next 10 years as well