Use the given graph to estimate the left Riemann sum for the given interval with the stated number of subdivisions. (Round your answer to the neares [0, 40], n = 4 20 12 4 The xf-coordinate plane is given. A curve passes through the following approximate points. (0, 20.0) (5, 10.9) (10, 5.4) (15, 3.5) (20, 3.9) (25, 4.9) K (30, 6.7) (35, 9.2) (40, 12.4) :.. 320 X