$($The bond's first call date is in five years.$)$ Coupon payments are made semiannually $($so use semiannual compounding where appropriate$).$

a$.$ Find the current yield, YTM$,$ and YTC on this issue, given that it is currently being priced in the market at $$1,100.$ Which of these three yields is the highest? Which is the lowest? Which yield would you use to value this bond? Explain.

b$.$ Repeat the three preceding calculations, given that the bond is being priced at $$800.$ Now which yield is the highest? Which is the lowest? Which yield would you use to value this bond? Explain.