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5. [-/4 Points] DETAILS LARCALCET7 5.2.505.XP. MY NOTES AS Consider the function f(x) = 3x + 3. (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. 14- 12 12 10 CO 8- 2 -1 o o 3 X N -2 -2- O O 10 Co co A 2 0 3 x No -21 (b) Repeat part (a) using left endpoints. (Round your answer to two decimal places.) Sketch the graph and the rectangles