A blade held in a brace is used to tighten a screw at A. (a) Determine the horizontal forc...

A blade held in a brace is used to tighten a screw at A. (a) Determine the horizontal force exerted at B and the components of the force exerted at C, knowing that these forces are equivalent to a force-couple system at A consisting of a force R with Rx = −30 N and Ry and Rz. unspecified, and a couple M of moments Mx = −12 N · m, My = Mz = 0. (b) Find the corresponding values of Ry and R.. (c) What is the orientation of the slot in the head of the screw for which the blade is least likely to slip when the brace is in the position shown?