Present and Future Values of Single Cash Flows for Different Interest Rates changes in input variables affect the output variable.) Do not round intermediate calculations. Round your answers to the nearest cent. a. An initial $400 compounded for 10 years at 4%. $ b. An initial $400 compounded for 10 years at 8%. $ c. The present value of $400 due in 10 years at a 4% discount rate. $ d. The present value of $400 due in 10 years at an 8% discount rate. $