Figure shows the commands to unlock and set the passwords for oadm_sys, oadm_user, and oadm_report:

SQL> alter user oadm_sys account unlock identified by oadm_sys;
User altered.
SQL> alter user oadm_user account unlock identified by oadm_user;
User altered.
SQL> alter user oadm_report account unlock identified by oadm_report;
User altered.