1) Determine the root of f(x)=1221x+18x22.75x3 with stopping criteria of a=1% (a) Using Bisection Method with the initial bracket of xl=1 and xu=0. (b) Using Newton-Raphson Method with the initial guess of x0=1. (c) Using Secant Method with initial guesses of of x1=0 and x0=1. (d) Using Modified Secant Method with x0=1 and =0.01