Examine the statements that use flashback technologies:
1. FLASHBACK TABLEcustomers TO TIMESTAMP TO_TIMESTAMP ('2013-02-04 09:30:00',
' YYYY-MM-DD HH:MI:SS');
2. SELECT * FROM customers AS OF SCN 123456;
3. FLASHBACK TABLE customers TO BEFORE DROP;
4. FLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP ('2013-02-04 09:30:00', 'YYYY-
MM-DD HH:MI:SS');
5. SELECT * FROM customers VERSIONS BETWEEM SCN 123456 AND 123999;
6. ALTER TABLE customer FLASHBACK ARCHIVE;
Which set of statements depends on the availability of relevant undo data in the undo tablespace?