$\"\"$

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The function is $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Speed changes from $\"\"$ to $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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Approximate change is $\"\"$ .

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$\"\"$

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$\"\"$

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Approximate change is $\"\"$ .

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$\"\"$

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$\"\"$ ; $\"\"$ .