The external fracture fixation system, with a long rod and two pins, maintains the upper and lower fragments of the fractured femur in position. Assume no load is transmitted across the fracture plane during the early stage of healing. Consider an upward force of Fo = 900 N exerted by the ground on the foot, which is transmitted to the lower fragment as shown. Determine the internal load at the cross-section A in the pin, where it meets the rod, and at the cross-section B in the rod.