Problem 4-21 Present Value a. What is the present value of $9,310 invested in an account with an APR of 5.9 percent for 13 years, compounded annually? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. What is the present value of $9,310 invested in an account with an APR of 5.9 percent for 13 years, compounded semiannually? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. What is the present value of $9,310 invested in an account with an APR of 5.9 percent for 13 years, compounded monthly? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) d. What is the present value of $9,310 invested in an account with an APR of 5.9 percent, for 13 years, compounded continuously? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)