MATLAB and flowchart for the function you're creating in MATLAB

Exercise 4 (a) Create a flowchart for the secant method. (b) Write a function [y, iterations] = secant(f, x-, x-1, tolerance) that finds the zero of a continuous function close to 21 using the secant method. If the tolerance is not specified in the argument list, use the default value of 10-6. The first argument f must be a handle to a continuous function with one real input and one real output. The next two arguments must be real numbers in the domain off and close to a zero off The function should return the algorithm's best approximation to the root of the input function and the number of iterations used to compute the approximation