(A) Estimate the area under the graph of f(x) = 3x³ + 4 from * = -1 to z = 4, first using 5 approximating rectangles and right endpoints, and then improving your estimate using 10 approximating rectangles and right endpoints. 5 Rectangles = 320 10 Rectangles = 262.81 (B) Repeat part (A) using left endpoints. 5 Rectangles 125 10 Rectangles = 165.31 (C) Repeat part (A) using midpoints. 5 Rectangles = 10 Rectangles =

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