numerical mathods for engineer

Determine the highest real roots of f(x) = 1.6x3 9.4x2 + 13.8x - 5 a) Graphically b) Using three iterations of Newton-Raphson method (X, 4) c) Using three iterations of Secant method to determine the root between (X.1=2, X.-4) d) Repeat (b) and (c) using Matlab (Use M-files provided). Note: Show your complete work to get full credits