P511. 2. Let us revisit the numerical accuracy of the MATLAB built-in function trapz , and trapezoidal integration more generally, by examining 292/20tanxdx. Compute the global error as a function of h where Global error = Exact value - Numerical value . Consider as the total number of intervals 10,20,30, 190,200 . Plot your results putting ln (Global error) and ln(h) on the vertical and horizontal axes, respectively. Using the built-in function polyfit show that Globalerrorh1.9858h2