\"\"

\

The functions are \"\", \"\" , \"\" and \"\".

\

The volume of the curve is \"\".

\

Here \"\".

\

\"\"

\

\"\".

\

Consider the function \"\".

\

Graph:

\

Graph the function \"\".

\

\"\"

\

Observe the graph:

\

\"\".

\

\"\".

\

\"\"

\

\"\".

\

Therefore, the option \"\" is the correct choice.

\

\"\"

\

The option \"\" is the correct choice.