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Q2: The following equation describes the steady-state temperature distribution inside a rectangular plate of length 1 and widih 2. [ Lap/ace] uxx+uyy=0 Three of the sides are kept at zera temperature, while the lower edge has a temperature protle of sin (x/2). Using o mesh size of h=0.1, construct a grid and find the approximate values of v at the interior mesh points. a) Write finite difference equations b) Write a MATLAB program for the constructed grid and find the approximate values of u al he interior mesh points of temperature using Jacobi iteration. Start with a guess of O at all points at which volues are unknown, and use Jacobi iteration to find the solution accurote at all locotions within 0.05% Plot u(x,y) in 30 gid. c) Use the mathematics module in the COMSOL Multiphysics packoge to solve the equation. d) Plot your solutions in sections a,b and c and make your comments