CH is an altitude of the triangle ABC, m∠A = 40°, m∠B = 68°. The circle with the diameter CH intersects sides AC and BC at points N and M respectively. Find the measure of the angles CNM, HNM, and HMN.

CH is an altitude of the triangle ABC mA 40 mB 68 The circle with the diameter CH intersects sides AC and BC at points N and M respectively Find the measure of class=