Use (a) Fixed-Point Iteration method (b) Newton-Rhapson method and (c) Secant Method to find the solution to the following within error of 10^-6. Show your manual solution for the first three iterations, then prepare an Excel file for finding the root until the error is within 10^-6 shows also the graph of the function.

1. x³-2x²-5=0,when x = [1, 4]
2. sin x - e^-x=0,when x = [0,1]
3. (x-2)²-ln x =0,when x = [1,2]