Ingles 2 : How to say hello and goobay

How do you say hello in a formal way?

If I say What ´s up? is an informal way to say hello?

If i say What´s up is a [blank_start]simple[blank_end] way to say hello

If I say How are you is a [blank_start]formal[blank_end] way to say hello

If I say Have a nice day is a [blank_start]formal[blank_end] way to say goobye

Name one informal way to say goodbye

Name a friendly way to say goodbye

Name an other way to say hello

Name a frienly way to say hello

How are you student?