2. Exerciss Solve the following root finding problems with built-in functions in MATLAB, (a) cos(2x)x=0 (b) In(x) 3+5-o (c) Find a positive root for: tanh2x0.7 (d) Find two possible roots near (0.5, 1.5) and (-0.7, 3) for the system of equations: 2x O 1)2