1 3.20. Generate a MATLAB script to obtain a root of the following polynomial lying mund range -10 to 10 by the method of Successive Substitution using Iteration Method.m. f(x) = x3 +0.25x2 -0.75x 0.350 Using MATLAB, draw a graph of the polynomial for the given range of x. Label it and give it a title. Notice what this plot suggests in terms of the interval where the roots may lie. Then, draw a second graph for a narrower range (-0.60 to 1.40). Start with an initial estimate of 0.9. Verify your answer by using the fzero function. Also obtain all the roots of the polynomial with the roots function