The backup situation of an enterprise application is that a full backup of all files and directories was performed on February 1 (Feb 1), February 2 (Feb 2), February 3 (Feb 3), and February 4 (Feb…

The backup situation of an enterprise application is that a full backup of all files and directories was performed on February 1 (Feb 1), February 2 (Feb 2), February 3 (Feb 3), and February 4 (Feb 4) A cumulative incremental backup was carried out. The business disk failed on February 5. Now it is necessary to restore to the version on February 4. What backup files are needed?