Suppose we paid $$898\mathrm{.}90$ for a $$1,000$ par $10\%$ coupon bond with $8$ years to maturity and semi$-$annual coupon payments.

What is our yield to maturity? $/////$ the answer is $12$ percent. Could you please solve this with ytm formula? NOT Excel, just with YTM formula for calculation. Please solve this question to get $12$ percent only with YTM formula for calculation $($NOT EXCEL$)$