PLT Enterprises' bonds currently sell for $$935\mathrm{.}80.$ They have a $8-$year maturity, an annual coupon of $9\%,$ and a par value of $$1,000.$ What are their yield to maturity, current yield, and capital gain yield? $(6$ points$)$

The current price of a $20-$year bond with a $9\%$ annual coupon rate is $$968.$ The bond is callable after $10$ years with a call price of $$1,185.$ If interest payment is made annually, a$)$ what is the bond's yield to maturity? b$)$ what is the bond's yield to call? $(5$ points$)$

Using the same information in Q#$7,$ if interest payment is made semi$-$annually, a$)$ what is the bond's yield to maturity? b$)$ what is the bond's yield call? $(5$ points$)$