Can someone please solve this using hand and not excel

Stone Sour Corp. issued 26-year bonds 7 years ago at a coupon rate of 6.06 percent. The bonds make semiannual payments. If these bonds currently sell for 96 percent of par value, what is the YTM? (Enter your answer as a percentage, omit the "%"' sign in your response, and enter your answer with two decimal places. For example, 1.214% should be entered as 1.21.) ect! 6.4300