Calculate the future value of a 100 cash flow for the following combinations of rates and times. (Do not include the pound sign (). Do not round intermediate calculations. Round your answers to 2 decimal place. (e.g., 32.16).) Rate and Time a) r= 4%; t= 15 years b) r= 3%; t= 20 years c) r= 3%; t= 18 years d) r= 1%; t = 60 years Future Value $