a) Sketch the graph of a function that is concave up for x < 2, concave down for x > 2 and is always decreasing. b) Sketch the graph of a function that is concave down for x < 2, concave up for x > 2 and is always decreasing. c) Sketch the graph of a function that has a positive first derivative and a second derivative that is 0 for all real numbers.

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