What is the approximate yield to maturity for the following bonds? Assume these are bonds issued in the United States.
a. 10 years to maturity, 6 percent coupon rate, current price is $950.
b. 16 years to maturity, 0 percent coupon rate, current price is $339.
c. 25 years to maturity, 8.5 percent coupon rate, current price is $1030.