$\"\"$

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The curves are $\"\"$ , $\"\"$ , $\"\"$ and about $\"\"$ .

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Rewrite the curve $\"\"$ as $\"\"$ .

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Method of washer:

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The volume of the solid $\"\"$ is $\"\"$ , where $\"\"$ is the cross sectional area of the solid $\"\"$ .

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$\"\"$

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Graph:

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$\"\"$

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From the graph, intersection points are $\"\"$ and $\"\"$ .

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Integral limits are $\"\"$ and $\"\"$ .

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Outer radius wlii be distance from the line $\"\"$ to $\"\"$ .

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$\"\"$ .

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Inner radius wlii be distance from the line $\"\"$ to $\"\"$ .

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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Volume of the solid is,

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Volume of the solid is $\"\"$ .

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$\"\"$

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Volume of the solid is $\"\"$ .