The internal rate of return method is used by Carlisle Construction Co. in analyzing a capital expenditure proposal that involves an investment of $76,279 and annual net cash flow of $17,000 for each of the eight years of its useful life. 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. %