A rectаngulаr steel plаte [E = 205 GPa, ν = 0.31, and Y = 240 MPa] has a width оf 0.7 m, a length оf 1.3 m, and a thickness оf 25 mm. All four edges are simply supported. The plate is subjected to a uniform pressure of 120 kPa. Considering the effect of Poisson's ratio, determine the maximum bending stress in the plate.