What is the 2-norm of the eigenvalue array lambn? We will use this in order to check convergence of our iterative method. Store this as ln. a. Use the formula ||lambn||2 = sqrt(sum(lambn^2)) b. Use a built-in function in a programming language, suchjson numpy or MATLAB, to calculate the 2-norm of the eigenvalue array lambn. c. Use an online 2-norm calculator specific for eigenvalue arrays to compute ln. d. Apply the power iteration method to compute the 2-norm of the eigenvalue array lambn, storing the result as ln.