- The internal rate of return method is used by King Bros. Construction Co. in analyzing a capital expenditure proposal that involves an investment of $44,160 and annual net cash flows of $6,000 for each of the 10 years of its useful life.

**Present Value of an Annuity of $1 at Compound Interest**Year 6% 10% 12% 15% 20% 1 0.943 0.909 0.893 0.870 0.833 2 1.833 1.736 1.690 1.626 1.528 3 2.673 2.487 2.402 2.283 2.106 4 3.465 3.170 3.037 2.855 2.589 5 4.212 3.791 3.605 3.352 2.991 6 4.917 4.355 4.111 3.784 3.326 7 5.582 4.868 4.564 4.160 3.605 8 6.210 5.335 4.968 4.487 3.837 9 6.802 5.759 5.328 4.772 4.031 10 7.360 6.145 5.650 5.019 4.192 **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.

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