Oracle Database 18c XE comes with a sample database user named HR. This user owns several database tables in a sample schema for a fictional Human Resources department. However, for security reasons, this user's account is locked. You need to unlock this account before you can view the HR objects or build any applications that use these objects. Assume that you are logged in as Systems Administrator, provide the SQL*plus commands for unlocking the HR account, making sure that the password reuse and life time is unlimited.

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