1. The problem statement, all variables and given/known data Given a steady-state heat transfer for a 100mx100m plate, to be discretized to 6 nodes, governed by a heat tranfer equation: U_xx + U_yy = 0 Given dirichlet boundary conditions: U(0,y)=50, U(100,y) = 100,, neumann boundary: U_y(x,0)=0, U_y(x,100) = 0. Find the solution using FDM, applying a 5 point laplacian stencil. Use Gauss-Seidel method to solve for the system of equations arising from the FDM approximation. Use 0.01% relative error as stopping criterion. 2. Relevant equations U_xx = (U_x-1,y -2U_x,y +U_x+1,y)/(Δx)^2 U_yy = (U_x,y-1 -2U_x,y +U_x,y+1)/(Δy)^2 Assume equal spacing of nodes. Use Δx=Δy for simplicity. 3. The attempt at a solution Substituting the FDM approximations into the given PDE, U_x,y = .25*(U_x-1,j + U_x+1,j + U_x,j-1 + U_x,j+1) I'm not really sure about how I did the Gauss-Seidel part because what I got is that the temperature just linearly varies along X. U(0,y) = 50 U(20,y) = 60 U(40,y) = 70 U(60,y) = 80 U(80,y) = 90 U(100,y) = 100 I'm not really confident about the answer so I tried using Gaussian elimination and I got a different answer.