Examine the statements that use flashback technologies:1-FLASHBACK TABLE customers 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 BETWEEN SCN 123456 AND 123999;
6-ALTER TABLE customers FLASHBACK ARCHIVE;
Which set of statements depends on the availability of relevant undo data in the Undo tablespace?