This question was assigned as part of a sample exam. I do not understand how to compute the Riemann sum correctly and how to compute the integral in the second part. Any help with the solution would be appreciated.

Question 1. [5 POINTS] The following graph is the function y = f(r) defined on [-2, 6]. -2 -1 1. 3 points. Compute the Riemann sum of f(x) on the interval [-2, 6] using 4 rectangles and the midpoint approximation. 2. 2 points. Compute [ f() da