Use four rectangles to find an estimate of each type for the area under the given graph of f from z = 1 to z = 9. 1. Take the sample points from the left-endpoints. Answer. LA 2. Is your estimate Ly an underestimate or overestimate of the true area? Choose one 3. Take the sample points from the right-endpoints. Answer. R4= 4. Is your estimate Ra an underestimate or overestimate of the true area? Choose one 5. Use the Trapezoid Rule with n = 4. Answer: TA = 6. Is your estimate T4 an underestimate or overestimate of the true area? Choose one