For u(x,y) defined on the square domain of 0

boundary conditions () и, (0, у) %3D 1(iї) и, (1, у) %3D2(i) и, (х, 0) 3D= 3(iv) u, (х, 1) 3 4 . For what value of A may a solution (or solutions) exist for the system? Must provide the correct reasoning to receive credit. (Otherwise, no need to find the full solution for the system.)