Only need the Matlab code to question 2b). You are supposed to use function Laplace below to approximate U inside the boundary and use forward difference approximation (Function ExplicitHeat) to approximate U along the boundary. Basically, you would need to combine the code for Laplace and ExplicitHeat and generate a plot for the PDE.

2. Write a finite difference code to solve the following steady-state problems: Uxx + Uyy = 0, 0