26. The figure below illustrates a thin plate of thickness t. An approximate displacement field, which accounts for displacements due to the weight of the plate, is given by u(x,y)=^(2bx-x2 -vy2)

v{x,y) = -^y{b-x)

(a) Determine the corresponding plane stress field.

(b) Qualitatively draw the deformed shape of the plate.