b) A W250 x 32.7 rolled-steel shape of column AB carries a load P = 65 kN as shown in Figure 2. Cables BC and BD are taut and prevent motion of point B in the x-z plane. Use E = 200 GPa, and y = 410 GPa. i) ii) Using Euler's formula and a factor of safety of 2.2, and neglecting the tension in the cables, determine the maximum allowable length L. [C02/PO2/WK3][C4](10 marks) Calculate the critical stress and slenderness ratio. Which plane the column will buckle? Figure 2 B W250 x 32.7 [CO3/PO3/WK3][C5](10 marks)