Use four rectangles to find an estimate of each type for the area under the given graph of f from a == 1 to a = 9. 1. Take the sample points from the left-endpoints Answer Li = 33.6 2. Is your estimate Dy an underestimate or overestimate of the true area? Underestimate v 3. Take the sample points from the right-endpoints. Answer Ra = 33.64 4. Is your estimate Ra an underestima hor overestimate of the true area? | Overestimate 5. Use the Trapezoid Rule with n = 4. Answer. 7 = 31.26 6. Is your estimate T; an underestimate or overestimate of the true area? | Overestimate