M5.2 The roof and second floor of a building are supported by the column shown. The structural steel [E = 200 GPa] column has a constant cross-sectional area of 7,500 mm². Determine the deflection of joint C relative to foundation A. 4.2 m 125 kN 5.0 m (1) 125 kN 175 kN 175 kN B (3)