You recently paid $13,500 for an investment that promises to pay $675 at the end of each of the next 6 years, then an additional lump sum payment of $17,500 at the end of the 6th year. What is the expected rate of return on this investment? O a. 13.1% O b. 9.5% c. 11.3% O d. 8.9% e. 10.2%