Problem 4-21 Future Value a. What is the future value in six years of $1,200 invested in an account with an APR of 9 percent, compounded annually? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Future value b. What is the future value in six years of $1,200 invested in an account with an APR of 9 percent, compounded semiannually? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Future value c. What is the future value in six years of $1,200 invested in an account with an APR of 9 percent, compounded monthly? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Future value d. What is the future value in six years of $1,200 invested in an account with an APR of 9 percent, compounded continuously? (Do not round intermediate calculations and round your answer to2 decimal places, e.g., 32.16.) Future value