trapezoid rule and simpson's rule coded into python
https://pythonnumericalmethods.berkeley.edu/notebooks/chapter21.03-Trapezoid-Rule.html https://pythonnumericalmethods.berkeley.edu/notebooks/chapter21.04-Simpsons-Rule.html