The head-and-motor assembly of a radial drill press was originally positioned with arm AB parallel to the z axis and the axis of the chuck and bit parallel to the y axis. The assembly was then rotated 25o about the y axis and 20o about the centerline of the horizontal arm AB, bringing it into the position shown. The drilling process was started by switching on the motor and rotating the handle to bring the bit into contact with the work piece. Replace the force and couple exerted by the drill press with an equivalent force-couple system at the center O of the base of the vertical column.