An engineer planning for his child$$s college educa$$tion purchased a zero$-$coupon corporate bond $($i$.$e$.,$ a bond that has no dividend payments$)$ for $$9250.$ The bond has a face value of $$50,000$ and is due in $18$ years. If the bond is held to maturity, determine the i$*$ for the investment.

Enter the IRR without the $\%$ sign, xx$.$x