(b) Find the roots of f(x) = 4x4 - 3x3 - 30, using Newton Raphson method with initial guess, x=-2 correct to 3 significant figures. i 1 x1 -2 f(x) f(x) Xi+1 ea (%) For both methods retain 5 decimal places. Show your calculations for first three iterations below the respective tables. Take the quiz on blackboard when you are done with the calculations.