You are comparing two different options associated with a 30-year mortgage. The first option is an interest rate a 3.5% with 2 points due at closing and the second option is an interest rate of 4.00% with no points due at closing. What is the marginal cost of borrowing associated with the second option if you expect the loan to be repaid after 60 months?

The answer is 6.382 I just don't know how to solve to get it.