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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def audit(jail=None, chroot=None, root=None):
    '''
    Audits installed packages against known vulnerabilities

    CLI Example:

    .. code-block:: bash

        salt '*' pkg.audit

    jail
        Audit packages within the specified jail

        CLI Example:

        .. code-block:: bash

            salt '*' pkg.audit jail=<jail name or id>

    chroot
        Audit packages within the specified chroot (ignored if ``jail`` is
        specified)

    root
        Audit packages within the specified root (ignored if ``jail`` is
        specified)

        CLI Example:

        .. code-block:: bash

            salt '*' pkg.audit chroot=/path/to/chroot
    '''
    return __salt__['cmd.run'](
        _pkg(jail, chroot, root) + ['audit', '-F'],
        output_loglevel='trace',
        python_shell=False
    )