As shown in the figure, the rectangular flat plate with chamfering has three pin holes. The dimensions are shown in the figure (unit: mm), ignoring the thickness of the plate. Material E=2E11Pa, u= 0.3. The upper surface of the plate was subjected to uniform pressure q=1000Pa by applying full restraint to the three pin holes of the plate. Find the total displacement of the plate, SEQV equivalent stress? Please complete the assessment according to the following requirements: 1) Correctly build the geometric model according to the given size; 2) Regular quadrilateral mesh division of the geometric model; 3) Apply boundary conditions and loads; 4) Solve the total displacement and total stress intensity of the model q=1000Pa R20)