i have the answer i just need to know how to individually find PMT, I, and so on and how that all combines to get answer

A 6.70 percent coupon bond with 28 years left to maturity can be called in nine years. The call premium is one year of coupon payments. It is offered for sale at \$1,136.95. What is the yield to call of the bond? (Assume interest payments are semiannual.) (Round your answer to 2 decimal places.) Explanation TVM calculator: N=18,PV=1,136.95,PMT=33.50,FV=1,067.00,CPTI=2.676% YTC=2.676%2=5.35%