During a certain activity, a hinged knee prosthesis (material is CoCr - Endurance Strength = 330 MPa) is subjected to a cyclically varying bending moment with a mean value of 0 N mm. The maximum bending moment acting on the stem of the prosthesis is equivalent to the body weight of 700 N acting at 40 mm from center of the stem. The stem is assumed to have a square section of side 11 mm. Is there any likelihood of a stem fracture? Use the most conservative fatigue failure criteria.