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19-26. Left and right Riemann sums Complete the following steps for the given function, interval, and value of n. a. Sketch the graph of the function on the given interval. b. Calculate Ax and the grid points ... c. Mustrate the left and right Riemann sums. Then determine which Riemann som underestimates and which som overestimates the area under the curve. d. Calculate the left and right Riemann ums. 19. 10. 1 on (0,4): 4 20. f)-9-xon (3.8); R = 5 | 21, fx = cos I on R=4

29-34. Midpoint Riemann sums Complete the following steps for the given function, interval, and value of n. a. Sketch the graph of the function on the given interval b. Calculate Ax and the grid points x0, X1, ... * c. Illustrate the midpoint Riemann sum by sketching the appropriate rectangles. d. Calculate the midpoint Riemann sum. 29. f(x) = 2 x +1 on [0, 4]: n = 4