Identify the memory component from which memory may be allocated for：（）
1. Session memory for the shared server
2. Buffers for I/O slaves
3. Oracle Database Recovery Manager （RMAN） backup and restore operations

In your database instance， the user sessions are connected to the database server from the remote machines.You want to achieve the following for these users：
1. The user account must be locked after four unsuccessful login attempts.
2. The user must be prompted to change the password at regular intervals.
3. The user may not have more than three simultaneous sessions.
4. The user session must automatically be logged off if more than 10 minutes elapsed time used.
How would you accomplish the above（）