Hello, I'm still new to Java and I have a certain problem in my code.

I've made 2 classes (Person and Group) and 1 demo (Which is used for testing my classes).

Person works perfectly fine when I use it along with my demo.
Though, I'm having a bit of trouble importing/using certain methods from Person in Group.
The problem is that I do not know how to import/use a method from another class in my Group class...