The forces and couples shown are applied to two screws as a piece of sheet metal is fasten...

The forces and couples shown are applied to two screws as a piece of sheet metal is fastened to a block of wood. Reduce the forces and the couples to an equivalent wrench and determine (a) the resultant force R.(b) the pitch of the wrench, (c) the point where the axis of the wrench intersects the xz plane.