please show how you arrived at the answers for ytm and ytc. ty!

11. Trickle Corporation's 21 percent coupon rate, semiannual payment, $1,000 par value bonds which mature in 24 years. The bonds currently sell for $1,230.51 in the market. What is the bond Yield-to- Maturity (YTM) ? 8.50% 17.00% 12. A $1,000 par value bond sells for $1,216. It matures in 20 years, has a 49 percent coupon, pays interest semiannually, and can be called in 5 years at a price of $1199. What is the bond's Yield -to-Call? 40.19% 20.09%