Indicate if these statements are True or False:

1. External schemas provide physical data independence, while conceptual

schemas offer logical data independence.

2. External schemas allows data access to be customized at the level of

individual users or groups of users.

3. While there are several views for a given database, there is exactly one

conceptual schema to all users.

4. Physical schemas describe how the data defined in the conceptual schema are

actually stored on disk.