Calculate the yield to maturity on the following bonds: L$($G $3-2)$

a$.$ A $9$ percent coupon $($paid semiannually$)$ bond, with a $$1,000$ face value and $15$ years remaining to maturity. The l bond is selling at $$985.$

b$.$ An $8$ percent coupon $($paid quarterly$)$ bond, with a $$1,000$ face value and $10$ years remaining to maturity. The bond is selling at $$915.$

c$.$An $11$ percent coupon $($paid annually$)$ bond, with a $$1,000$ face value and $6$ years remaining to maturity. The bond si seling at $$1\mathrm{.}065.$