These are the details about V$FLASHBACK_DATABASE_STAT:
SQL> DESC V$FLASHBACK_DATABASE_STAT Name Null? Type
------------- -------- --------------
BEGIN_TIME DATE END_TIME DATE
FLASHBACK_DATA NUMBER
DB_DATA NUMBER REDO_DATA NUMBER
ESTIMATED_FLASHBACK_SIZE NUMBER
Which two statements regarding the V$FLASHBACK_DATABASE_STAT view are true? ()