DYI Construction Co. is considering a new inventory system that will cost $750,000. The system is expected to generate positive cash flows over the next four years in the amounts of $350,000 in year one, $325,000 in year two, $150,000 in year three, and $180,000 in year four. DYI's required rate of return is 11%. What is the modified internal rate of return of this project?

a) 10.87% b) 14.35% c) 11.57% d) 13.06%