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Internal Rate of Return Method an investment of $23,022 and annual net cash flows of $6,000 for each of the eight 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 haternal rate of return. If required, round your answer to three decimal places. b. Using the factor determined in part (a) ard the present value of an annulty of $1 table above, determine the internal rate of return for the proposa'. %