From a finite mathematics course. Please show work.

A new-or dealer will give you $ 5.180 for the trade in of your old car - to be used towards the purchase of a new car- and a 4.8 % loan on the balance of the price. If the monthly payment ends up being $ 379.65 over four years, what is the price of the new car? Let's assume a person has a credit card balance of $ 4400, and that a) no additional charges will be made to the credit card, and b) the person pays the minimum payment of $ 44 each month, and c) the credit card company charges 6 % compounded monthly. How many months will it take to pay off the $4400