Need help with a,b,c

You take out an $8,900 car loan that calls for 48 monthly payments starting after 1 month at an APR of 6\%. a. What is your monthly payment? Note: Do not round intermediate calculations. Round your answer to 2 decimal places. b. What is the effective annual interest rate on the loan? Note: Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places. c. Now assume the payments are made in four annual year-end installments. What annual payment would have the same present value as the monthly payment you calculated? Note: Do not round intermediate calculations. Round your answer to 2 decimal places