John has been offered an investment opportunity that promises him 5% compounded semiannually for the first 2 years and 8% compounded annually for the next 5 years. If he invested $10,000 today, the value of the investment at the end of the 7 years will be closest to:

a) $16,218.63

b)$16,402.08

c) $16,199.34

d) $17,138.24