A machine component is subjected to an axial load that varies from 3000 lb compression to 5000 lb tension. Determine the combination of maximum and minimum stresses to which the member could probably be subjected millions of times without failure by slip or fracture if the proposed material is hardened and tempered 0.93 percent carbon spring-steel with an endurance limit of 56 ksi, a proportional limit of 85 ksi, and an ultimate strength of 97 ksi.