Discuss the following:
Q: Consider two-dimensional, steady-state conduction in a square cross section with prescribed surface temperatures
(a) Determine the temperatures at nodes 1, 2, 3, and 4. Estimate the midpoint temperature.
(b) Reducing the mesh size by a factor of 2, determine the corresponding nodal temperatures. Compare your results with those from the coarser grid.
(c) From the results for the finer grid, plot the 75, 150, and 250°C isotherms.
