2. Describe the fixed-point Iteration method in details to find a root of the equation 3-x-1=0. Then discuss the convergence of the two functions = g(x) = x+1 and x = 92(x) = 3-1. [25 marks] 3. Describe the method of Gaussian Elimination with Back Substitution for solving a linear systems AX-B of N equations and W unknowns. Moreover, to explain the two pivoting strategies: Trivial Pivoting and Partial Pivoting. [25 marks]