Please attach your matlab code! thanks

- Use a 2nd order Lagrange interpolating polynomial in order to perform the numerical differentiation. Recall that in this technique, a 2nd order polynomial is fit to three neighboring data points. The polynomial is then differentiated analytically to obtain the formula 2x - r f'(x) = f(xi-1) Write a user-defined Matlab function to calculate the derivative of unequally spaced data. Your function should accept two vectors as input (f and x) and output the derivative d^ evaluated at the locations given in X. This means you should set x-xiin the above equation. One strategy is to create a for-loop that loops through every data point and calculates f(xi) at each ith data point using the above formula. Make sure that your function properly calculates the derivatives at xi (first data point in the vector) and Xn (last data point in the vector) - your code will need to handle these end points separately. [Submit the file containing your function]