A small 6-mm diameter pin was designed using ASTM no. 40 cast iron to withstand an axial compressive load of 3.5kN combined with a tensional load of 9.8 N.m. Calculate the factor of safety the designer m must have used. The elongation in a 2-in specimen of ASTN No. 40 at failure is approximately 0.5%-1.0%. (Use all applicable theories)