2 = Write a MATLAB script that finds all the roots of the following function inside the interval [-4 4] using the bisection method (by calling the bisection function used during the related lecture): f(z) = ce 1+2+1 Take tolerance as 1x10-4 Your script should also generate a plot of the function showing the location of the initial guess(es) and the approximated root value(s). At the end of the script report the results and the number of iterations required using comment lines. (27) 1) A series of uniaxial and triaxial compression tests were performed in the laboratory on the same type of core samples, The graph below presents the stress (o) - strain ) curves for one of the uniaxial compression tests. (MPa) a) Calculate initial (6.), tangent (Fran) and secant (Bud elasticity modulus, - 105 MP b) i confining stresses and the corresponding strengths are as follows for 03-60 MPa, 260 MPa for 150 MPa, 6540 MPa 8,1%) Eg(%) from the triaxial tests of the same kind of core samples, then plot the Mohr-Coulomb failure envelope and determine the values of internal friction angle (6), cohesion (c), and fracture angle (o)