need help! please show work so i can learn.

3. (10 points total.) You want to buy a new car for $100,000, and the finance office at the dealership has quoted you an APR of 6% for a 72 -month loan. a. (4 points.) What will your monthly payments be with $0 down? 5 b. (4 points.) What will your monthly payments be if you put $50,000 down? c. (2 points.) What is the effective annual rate (i.e., EAR) on this loan