Help me please :) The White Stone Company issued a bond with four years remaining to maturity, a $$1,000$ face$$value$,$ and an annual coupon rate of $9\%.$

a$.$ What is the yield to maturity if the bond is trading at the current market price of $(1)$ $$780$or $(2)$ $$1,200?$ I got $17\mathrm{.}02\%$ for $$780$ and $3\mathrm{.}55\%$ for $$1,200$

b$.$ Would you be willing to pay $$780$ for the bond if you thought the appropriate interest rate$$was $11\%?$ Briefly explain your answer.