$\"\"$

The real number is $\"\"$ .

At $\"\"$ ,

$\"\"$ , (Since $\"\"$ )

$\"\"$ , (Since $\"\"$ ) $\"\"$ ,

$\"\"$ ,

$\"\"$ , and

$\"\"$ .

$\"\"$

The values of $\"\"$ , $\"\"$ , $\"\"$ , $\"\"$ , $\"\"$ , and $\"\"$ .