Which greeting expressions are formal or informal? Write (F) for formal greetings and (I) for informal greetings.

1) Good morning. ( )

2) Long time no see! ( )

3) What's up? ( )

4) Pleased to meet you. ( )

5) What's new? ( )

6) Nice to meet you. ( )

7) Hey! ( )

8) Good to see you! ( )

9) Good afternoon! ( )

10) How are you? ( )