The internal rate of return method is used by Testerman Construction Co. in analyzing a capital expenditure proposal an investment of $26,848 and annual net cash flows of $8,000 for each of the five years of its useful life. Present Value of an Annulty of $1 at Compound Intoract a. verermine 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