ne roOUS OI f(x) = 0, $(x) = (x8 429 37 - 23 - 2 +20). (a). Using the initial guess of x = 1, obtain the next guess using Newton's method. (b). Using the initial guesses of x = 0 and 2 = 1, obtain the next guess using the secant method. c). Obtain all roots of f(x) using the Matlab function roots(coeff). (d). Obtain all real roots of f(x) using the Matlab function fzero