If Marie can afford a $250 per month car payment. She found a 5 year loan at 7% interest. How expensive of a car can she afford

If she decided to finance a $12.000 car at 3% compounded monthly for 4 years

A) what would the monthly payment be

B) How much Interest will be paid over the life of the loan?

A friend bought a house 15 years ago taking out a $120000 mortgage at 6% for 30 years how much does that friend still owe on the mortgage