need help with this question.

You want to buy a new sports coupe for $93,500, and the finance office at the dealership has quoted you an APR 675 percent for a 48 month loan to buy the car a. What will your monthly payments be? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g. 32.16.) What is the effective annual rate on this loan? (Do not found intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g. 32.16.) a. Monthly payment b. Effective annual rate