Sketch the graph of a single function f that satisfiesall of the conditions below.
(a) f '(x) < 0 on (1,∞),f '(x) > 0 on (−∞,1)
(b) f ''(x) > 0 on (−∞,−2) and (2,∞),f ''(x) < 0 on (−2,2)
(c) lim x→−∞ f(x) =−2, lim x→∞ f(x) = 0
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