The student in Problem $6-62$ received $$2500$ as a graduation present.

$6-63$ If an extra $$2500$ is paid at Month $1,$ when is the final payment

made? How much is it$?$

Sam can afford to spend $$500$ per month on a car. He figures he

needs half of it for gas, parking, and insurance. He has been to the

bank, and they will loan him $100\%$ of the car's purchase price. $($Note:

If he had a down payment saved, then he could borrow at a lower

rate.$)$