Q8 Determine the highest real root of f(x)=2.1x311.6x2+17.5x6 (a) Graphically. (b) Newton-Raphson method (three iterations, x0=3 ). (c) Secant method (three iterations, x1=3,x0=4 ). (d) Modified seeant method (three iterations, x0=3,=0.01 ). Compute the approximate percent relative errors for your solutions