Blue Moose Home Builders Inc. has $9\%$ annual coupon bonds that are callable and have $18$ years left until maturity. The bonds have a par value of $$1,000,$ and their current market price is $$1,070\mathrm{.}35.$ However, Blue Moose Home Builders Inc. may call the bonds in eight years at a call price of $$1,060.$

Blue Moose Home Builders Inc.$$s bonds have a yield$-$to$-$maturity $($YTM$)$ of