Two steel rods (AB and BC) were subjected to tensile load P as shown in Figure 2. Diameter of the rod AB and rod BC are 30 mm and 40 mm, respectively. The rods were assumed to be elastoplastic. Modulus of elasticity is 210 GPa and yield strength is 300 MPa. The load was applied to the rods at point A and it stretched the both rods. Total elongation of the rods was x mm. After the rods elongated, the force was removed. If measured permanent elongation was 8 mm, calculate the load P and total elongation x? (50 points) 40 mm diameter 1.2 m 30 mm diameter 0.8 m Figure 2