$\"\"$

\

The functions are $\"\"$ .

\

$\"open$

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$

\

$\"\"$ \ \

\

$\"open$

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$

\

$\"\"$

\

$\"\"$ so the functions are not inverse.