Choose two.

V$SERVICE_EVENT displays wait counts for every wait event for each service even including counts of zero for waits that never occurred.

V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.

V$SESSION_WAIT and V$SESSION both contain details of the event on which a waiting session is currently waiting.

V$SESSION_EVENT displays all waits events for those events that have occurred at least once for sessions that have now terminated.

V$SESSION_WAIT_CLASS displays waits broken down by wait class only for terminated sessions.