P5-60 Number of years to provide a given return In each of the following cases, determine the number of years that the given ordinary annuity cash flows must continue to provide the desired rate of return given the cost of the annuity, Case Desired rate of return 11% Cost of annuity $ 1,000 150,000 80,000 Annuity payment $ 250 30,000 10,000 275 3,500 600 17,000