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10. [-/4 Points] DETAILS LARCALCET7 5.2.505.XP. Consider the function f(x) = 4x + 1. (a) Estimate the area between the graph of f and the x-axis between x = 0 and x = 3 using six rectangles and right endpoints. (Round your answer to two decimal places.) Sketch the graph and the rectangles. (b) Repeat part (a) using left endpoints. (Round your answer to two decimal places.) Sketch the graph and the rectangles. X N