Internal Rate of Return Method The internal rate of return method is used by Queen Bros. Construction C0, in analyzing a capital expenditure proposal that involves an investment of $22,B40 and annua! net cash flows of $8,000 for each of the four years of its useful life. Present Value of an Annuity of $1 at Compound Interest a. Determine a present value factor for an annuity of $1 which can be used in determining the internal rate of return. If required, round your answer to three decimal places. b. Using the factor determined in part (a) and the present value of an annuity of $1 table above, determine the internal rate of return for the proposal. s