Billy and Mandy Jones have $24,000 to invest. On average, they do not make any investment that will not return at least 7.4% per year. They have been approached with an investment opportunity that requires $24,000 upfront and has a payout of $5,900 at the end of each of the next 5 years. Using internal rate of return (IRR) method and their requirements, determine whether Billy and Mandy should undertake the investment.
The internal rate of return (IRR) of this investment opportunity is ____%