Internal rate of return method

The internal rate of return method is used by Royston Construction Co$.$ in analyzing a capital expenditure proposal that involves an investment of $$77,888$ and annual net cash flows of $$16,000$ for each of the $7$ years of its useful life.

$\backslash$table$[[$Present Value of an Annuity of $$1$ at Compound Interest,$],[$Year$,6\%,10\%,12\%,15\%,20\%$