I only need part B in python

In this lab, we explore ways to approximate definite integrals which cannot be integrated using the Fundamental Theorem of Calculus. Use Python to solve each problem. 1. Given the integral et dx: 23 (a) Plot the function on the domain x (1, 3). (b) Recall the Left Endpoint Riemann Sum from 151: s(x) dx = f(+:--)Az i=1 b - a where Ar= and x; = a +i Ar. This is easy to compute in Python: n i. Define a list z from (inclusive) to b (exclusive) with stepsize Ar (NOTICE this is the only difference between this method and the Right Endpoint method done in the Overview). ii. Define a list y = = f(x). iii. Sum the list y and multiply by A.x. Compute the Left Endpoint approximation using n= 100 subintervals