Following is a table for the present value of $1 at compound interest: Year 6% 10% 12% 1 0.943 0.909 0.893 2 0.890 0.826 0.797 3 0.840 0.751 0.712 4 0.792 0.683 0.636 5 0.747 0.621 0.567 Following is a table for the present value of an annuity of $1 at compound interest: Year 6% 10% 12% 1 0.943 0.909 0.893 2 1.833 1.736 1.690 3 2.673 2.487 2.402 4 3.465 3.170 3.037 5 4.212 3.791 3.605 Using the tables provided, the internal rate of return of an investment of $227,460 that would generate an annual cash inflow of $60,000 for the next 5 years is Oa. 6% Ob. 10% Oc. 12% Od. cannot be determined from the data given