Suppose that you purchased a Ba rated $5,000 annual coupon bond with a 14.3% coupon rate and a 19-year maturity. The current rate on 19-year US treasuries is 3%. If you purchased it at a 9.954% premium, what is the bond's yield to maturity?
a) 11.3%
b) 9.35%
c) 12.8%
d) 10.7%