Which of the following is not an accurate statement about views?

select one or more

1.views a publicly referenced names and no special authority of privilege is needed to use them. 2.views can be used to restrict access to columns in base table that contain sensitive data

3.Views can be used to store queries that multiple applications execute on a regular basis in the database

4.all views are updatable.

5.Views may degrade the performance of the database.