3. Use finite difference formulas 6.14, 6.18, 6.27, 6.40 (Dunn&Constantinides book) with equally spaced forward and backward points with distance h = 0.4, 0.2, 0.1 , 0.05, 0.025 to estimate the derivative of the function y-2x3 at x-2. Plot the error you get utilizing each equation versus increment size h