Read the signs below. Now tell a friend what you must

Read the signs below. Now tell a friend what you must or mustn't do when you are in the library, as in the example.
Пример: You mustn't talk when you are in the reading room.
Это те отрывки с которыми надобно сделать,
1.Smoking is prohibted
2.No food or drinks in the library
3.Turn off mobile phines
4.Show your card to the librarian when taking out books