Corso Books has just sold a callable bond. The bond is a thirty$-$year semiannual bond with a coupon

rate of $6\%.$ Investors, however, can call the bond starting at the end of ten years. If the yield to call

on this bond is $8\%$ and the call requires Corso Books to pay one year of additional interest at the call

$($two coupon payments$),$ what is the bond price if priced with the assumption that it will be called on

the first available call date? please provide the formulas and solution step by step