Q3: Consider the following differential equation u-k=f, 0≤x≤1 With u =3, k=1, f=1. The equation is supported by the following boundary conditions: T(O)=0 and T(1)=0 Use COMSOL with five elements and six nodes to solve the given equation. (6 Points) a) List all steps to solve the equation using COMSOL. b) Plot the solution T vs. x and compare the COMSOL solution with the exact solution.