The internal rate of fufurn method is used by foyston Construction Co, in analyzing a capial ewenditure proposal that involyes an inveltment of 5106,200 and armaal net carh flows of 520,000 for each of the 8 years of its useful life. a. Determine a present value factor for an onnuity of 51 , which can be used in determirung the internal rate of return. If required, round your answer to three decimal places. b. Usina the factor determined in part (a) and the present value of an ennaty of st table above, determine the internal rate of return tor the proposal