Question 75
Given a triangle $ABC$, where $O$ is its circumcenter, $M$ is a midpoint of $BC$, and $W$ is a point of the second intersection of bisector of $C$ with the circumcircle. The line parallel to $BC$ that passes through $W$ intersects $AB$ at point $K$, so that $BK = BO$. Find the angle $WMB$.