The uniform 6-kg slender rod rests on the top center of the 3-kg block. If the coefficient...

The uniform 6-kg slender rod rests on the top center of the 3-kg block. If the coefficients of static friction at the points of contact are μA = 0.4, μB = 0.6, and μc = 0.3, determine the largest couple moment M which can be applied to the rod without causing motion of the rod.