A steel beam, of lengths a = 4 m and b = 5 m and a hollow box cross section, is supported by a hinge support A and roller support B, see Figure Q.1. The width and height of the cross section are 200 mm and 300 mm, respectively, and the wall thickness of the cross section is 5 mm. The beam is under a distributed load of the intensity that linearly varies from q = 0 kN/m to q = 3.3 kN/m for AB span; and is constant with q = 3.3 kN/m for BC span. The Young's modulus of steel is 200 GPa. a) the vertical support reaction in support A. When sketching FBD, set the positive directions of both reactions in the positive direction of y axis. Enter your answer in kN to three decimal places. T y, v a 5 mm 200 mm q 300 mm B b C X