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Determine the highest real root of f(x)=x36x2+11x6.1 (a) Graphically with MATLAB (b) Calculating by hand using the fixed point method (successive substitution) with three iterations while calculating the relative absolute errors. Use initial point xi=3.5. (c) Calculating by hand using the secant method with three iterations while calculating the relative absolute errors. Use initial points as xi1=2.5 and xi=3.5. (d) Write a MATLAB code that uses Newton-Raphson to determine the root with a relative error of 104