A $5\mathrm{.}20$ percent coupon bond with $17$ years left to maturity can be

called in five years. The call premium is one year of coupon

payments. It is offered for sale at $$1,080\mathrm{.}70.$ What is the yield to

call of the bond? $($Assume interest payments are semiannual.$)($Round

your answer to $2$ decimal places.$)$