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The number set is $\"\"$ and $\"\"$ .

Find rational number between the numbers.

Consider the rational number is $\"\"$ and $\"\"$ .

$\"\"$ is a rational number.

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Find irrational number between the numbers.

Consider an irrational number between the $\"\"$ and $\"\"$ .

$\"\"$ is an irrational number.

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a. $\"\"$ is a rational number.

b. $\"\"$ is an irrational number.