Your mothrr paid $ 10,000 ( CF at t 0 ) for an investment that promises to pay $ 850 at the end of each of the next 5 years , then an additional lump sum payment of $ 12,000 at the end of the 5th year . What is the expected rate of return on this investment ?

a 6.77 %

b . 7.13 %

c. 8.57 %

d . 11.67 %

e . 13.27\%