I need your help fast thank you

3.

It helps in code optimization.

It requires less code to write.

It has nested classes which are used to develop more readable and maintainable code.

It logically group classes and interfaces in one place only.

It can access all the members (data members and methods) of outer class including private.

you need to find g (4).

explanation:

so you can put the defined values of x variables in as 4 and solve the equation and you will get your answer.