A company's weighted average cost of capital is 8.8% per year. A project requires an investment of $150,000 today and it is expected to generate after-tax cash flows of $20,000 at the end of year 1,$50,000 at the end of year 2,$60,000 at the end of year 3 , and $30,000 at the end of year 4 . What is the project's annual modified internal rate of return (MIRR)? A) 4.7% B) 7.2% C) 5.5% D) 8.5% E) 6.7%