Miller Brothers is considering a project that requires an initial investment of $68,700 today and will produce cash inflows of $19,600, $22,300, $27,500, and $15,300 a year for the next four years, respectively. What is the internal rate of return of the project? O a. 9.08% O b. 9.58% O c. 3.97% O d. 5.20%