It is known that when a single reinforced asymmetric plate section with a height of h = 50 cm, body width bw = 25 cm, effective table width b = 50 cm and table thickness t = 12 cm reaches the carrying capacity, the elongation in the tensile reinforcement is s = 0.0025. Calculate the tensile reinforcement area (As) of the cross section and the bearing bending moment (Mr) using the bearing strength relations. The material is C20 / S420. d '= 4 cm will be taken.