What is the present (ycar 0) value of the cash flow stream if the opportunity cost rate is 10 percent? What is the future (year 5) value of the cash flow stream if the cash flows are invested in an account that pays 10 percent annually? What cash flow today (year 0 ), in lieu of the $2,000 cash flowi vould be needed to accumulate $20,000 at the end of year 5