Consider the function y= x³ – 9x + 4. a. Sketch the graph of y= x3 - 9x + 4. b. Find and describe the slopes of the lines tangent at the following points. 1. (1, -4) 2. (2, -11 3. (3, -14) 4. (4, -10 5. (5, 9 c. Based on the slopes, determine the maximum and minimum point.

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