what are the five top responsibilities of DBA?

I rate following five tasks as the most important responsibilities of DBA.

1. Securing the database from physical as well as logical integrity damage.
2. Restore the database from backup as part of disaster management plan.
3. Optimize the queries performance by proper indexing and optimizing joins, where conditions, select clause etc.
4. Design the new schema and support legacy schema as well legacy database systems.
5. Help developers to be better at writing SQL related code.