$\"\"$

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The area under the graph of $\"\"$ above $\"\"$ -axis between $\"\"$ and $\"\"$ .

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(a) The exact area under graph of $\"\"$ above $\"\"$ -axis between $\"\"$ and $\"\"$ is $\"\"$ .

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

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$\"\"$

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Exact area under the graph of curve $\"\"$ square units.

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$\"\"$

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(b)

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Find the exact area under graph of $\"\"$ above $\"\"$ -axis between $\"\"$ and $\"\"$ .

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$\"\"$

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

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$\"\"$

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\ \ $\"\"$ square units.

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$\"\"$

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The solutions are

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(a) $\"\"$ square units.

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(b) $\"\"$ square units.

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