Consider the Laplace equation =D0, where 0 < x < 8 and %3D dy? 0 < y < 8. dx2 Given boundary conditions u(x,0) = -4, u(0, y) = 7 - y, u(8, y) = 8 + y and u(x, 8) = 8x. If step size is Ax = Ay = 4, then u(4, 4) =.....

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