Your bank will lend you $6,800 for 30 days at a cost of $85 interest. a. What is your annual rate of interest? (Use 365 days in a year. Do not round intermediate calculations. Round the final answer to 2 decimal places.) Annual rate of interest % b. What is your effective annual rate? (Use 365 days in a year. Do not round intermediate calculations. Round the final answer to 2 decimal places.) Effective annual rate %