$\"\"$

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The inequality is $\"\"$ .

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(a)

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The value of $\"\"$ .

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Substitute the value $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Since the above statement is true, $\"\"$ is a solution of $\"\"$ . $\"\"$

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(b)

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The inequality is $\"\"$ .

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The value of $\"\"$ .

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Substitute the value $\"\"$ in the inequality. \ \

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$\"\"$

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$\"\"$

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Since the above statement is false, $\"\"$ is not a solution of $\"\"$ . \ \ $\"\"$

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(c)

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The inequality is $\"\"$ .

\

The value of $\"\"$ .

\

Substitute the value $\"\"$ in the inequality. \ \

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Since the above statement is true, $\"\"$ is a solution of $\"\"$ . $\"\"$

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(d)

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The inequality is $\"\"$ .

\

The value of $\"\"$ .

\

Substitute the value $\"\"$ in the inequality. \ \

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

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Since the above statement is true, $\"\"$ is a solution of $\"\"$ . $\"\"$

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(a) Yes.

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(b) No.

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(c) Yes.

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(d) Yes.