$\"\"$

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(a)

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Observe the figure :

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If $\"\"$ , then the graph of $\"\"$ has horizontal tangent line at $\"\"$ .

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$\"\"$ at $\"\"$ and $\"\"$ .

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(b)

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If $\"\"$ exists at the inflection point, then $\"\"$ .

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$\"\"$ at $\"\"$ and $\"\"$ .

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$\"\"$

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(c)

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$\"\"$ does not exist at $\"\"$ .

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(d)

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$\"\"$ has relative maximum at $\"\"$ .

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(e)

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$\"\"$ has a point of inflection at $\"\"$ and $\"\"$ .

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$\"\"$

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(a) $\"\"$ at $\"\"$ and $\"\"$ .

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(b) $\"\"$ at $\"\"$ and $\"\"$ .

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(c) $\"\"$ does not exist at $\"\"$ .

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(d) $\"\"$ has relative maximum at $\"\"$ .

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(e) $\"\"$ has a point of inflection at $\"\"$ and $\"\"$ .