Arco Industries has a bond outstanding with $15$ years to maturity, an $8\mathrm{.}25\%$ nominal coupon, semiannual payments, and a $$1,000$ par value. The bond has a $6\mathrm{.}50\%$ vield to maturity, but it can be called in $6$ years at a price of $$1,045.$ What is the bond's yield to call?

Hint: Calculate the bond's price based on the YTM$,$ and then use that price to find the YTC$.$

Your answer should be between $4\mathrm{.}08$ and $10\mathrm{.}64,$ rounded to $2$ decimal places, with no special characters.