A recent college graduate wants to purchase a new car for $20,000. She makes a down payment of 10% and borrows the remaining amount from a local bank offering 8.4% APR compounded monthly for 5 years.

1) What is the minimum monthly payment required for this loan?

2) How much total interest will she pay if she makes the minimum monthly payment?

3) She decides to pay $428 per month instead of the minimum monthly payment. How long will it take her to pay off the loan?

4) How much total interest will she pay if she makes monthly payments of $428?

5) How much money will she save by paying $428 per month instead of the minimum monthly payment?

Please double check work, thank you!