a-1. Calculate the present value of an annual payment of $670.00 you would received for 4 years if the interest rate is 8.51%. (Do not round intermediate calculations. Round your answer to 2 decimal places.) a-2. Calculate the present value of an annual payment of $569.50 you would received for 7 years if the interest rate is 8.51%. (Do not round intermediate calculations. Round your answer to 2 decimal places.) b-1. Calculate the present value of an annual payment of $670.00 you would received for 4 years if the interest rate is 10.90%. (Do not round intermediate calculations. Round your answer to 2 decimal places.) b-2. Calculate the present value of an annual payment of $569.50 you would received for 7 years if the interest rate is 10.90%. (Do not round intermediate calculations. Round your answer to 2 decimal places.)