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Consider the following function. RX ) = (a) Make a sign diagram for the first derivative. --Select--v -Select--v -Select--.v -Select--v -Select--. v X X (b) Make a sign diagram for the second derivative. -Select--v -Select-.. v -Select- --Select--v -Select-..v -Select-- v -Select-- v X X X (c) Sketch the graph, showing all relative extreme points and inflection points