1. Determine the required size for a square bar to be made from AISI 1213 cold-drawn steel. It carries a constant axial tensile load of 1,500 lb and a bending load that varies from zero to a maximum of 800 lb at the center of the 48-in length of the bar. A constant torsional moment of 1,200 lb-in is applied in addition to other forces described before. Use a design factor of 3. (40 Points)