You can buy a car that is advertised for $17,640 on the following terms: (a) pay $17,640 and receive a $2,640 rebate from the manufacturer; (b) pay $490 a month for 3 years for total payments of $17,640, implying zero percent financing. a. Calculate the present value of the payments for option (a) if the interest rate is .75% per month. 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.) c. Which is the better deal? Option b Option a.