Question 2. Riemann Sums: Consider the shaded region below that is bound by the graph of f(x) = 6x-x and the x-axis between x = 0 and x = 6. 8 6 4 2 0 1 2 3 4 5 6 Approximate the area of the shaded region using the left sum approximation method with 3 rectangles. (Draw the corresponding rectangles on the above picture).