Sketch and estimate the area of the region bounded by y = ln x, y = 0, x = 1, and x = 13 by using: a) 9 evenly spaced rectangles and right endpoints. Area estimate: 12.80182 (be sure to enter at least 5 correct decimal places!) Underestimate or Overestimate? Enter U or O: b) 7 evenly spaced rectangles and left endpoints. Area estimate: (be sure to enter at least 5 correct decimal places!) Underestimate or Overestimate? Enter U or O: c) 5 evenly spaced rectangles and midpoints. Area estimate: (be sure to enter at least 5 correct decimal places!) Underestimate or Overestimate? (It's harder to tell... take a guess!) Enter U or O:

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