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Observe the graph:

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(a)

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The function $\"\"$ value at $\"\"$ is $\"\"$ .

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$\"\"$ .

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(b)

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In the graph there is a circle at $\"\"$ .

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$\"\"$ is not part of the domain.

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$\"\"$ is not defined.

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$\"\"$ is not defined.

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(c)

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The domain of the function is $\"\"$ .

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$\"\"$ is not in the part of domain.

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$\"\"$ is not defined.

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$\"\"$ .

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$\"\"$ is not defined.

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$\"\"$ is not defined.