$\"\"$

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The equations are $\"\"$ and $\"\"$ .

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Area of the region : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Consider $\"\"$ .

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Let $\"\"$ .

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Differentiate with respect to $\"\"$ .

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$\"\"$

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Substitute corresponding values in the above equation.

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$\"\"$

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Substitute $\"\"$ in the above equation.

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$\"\"$

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$\"\"$

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The area of region is $\"\"$ .

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$\"\"$

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Draw a coordinate plane. Graph the function $\"\"$ .

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$\"\"$

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$\"\"$

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The area of region is $\"\"$ .

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Graph of the function $\"\"$ :

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$\"\"$ .