You can buy a car that is advertised for $18,720 on the following terms: (a) pay $18,720 and receive a $3,720 rebate from the manufacturer, (b) pay $520 a month for 3 years for total payments of $18,720, implying zero percent financing a. Calculate the present value of the payments for option (a) if the interest rate is 75% per month Present value b. Calculate the present value of the payments for option (b) if the interest rate is 75% per month. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Present value c. Which is the better deal? O Option b Option a