La Mano Corporation bond with a $10\mathrm{.}5$ percent semiannual coupon has a yield to maturity of $8\mathrm{.}75$ percent.

The bond matures in $18$ years but is callable in $8$ years. The maturity value is $$1,000.$ The call price of

$$1,073.$ What is the bond$$s yield to call?

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