For the Next 15 Years Andre Expects to Earn 12

For the next 15 years Andre expects to earn 12% compounded semi-annually on the Retirement Savings Plan (RSP) that he is starting. For the subsequent 10 years he expects a return of 7% compounded semi-annually. How much money is he planning to have in 25 years if he invests $3,500 at the end of every six months for the 25 years?

A) $411,922
B) $610,059
C) $382,600
D) $451,603
E) $1,068,912