Compute the future value of a $100 investment for the following combinations of rates and times. a. r=7.1%,t=5 years. b. r=7.1%,t=15 years. c. r=5.1%,t=5 years. d. r=5.1%,t=15 years. Note: For all requirements, do not round intermediate calculations. Round your answers to 2 decimal places