def path2Extension(path):
    """Answers the file extension of path.

    >>> path2Extension('/xxx/yyy/zzz/Agency_FB-Compressed.ufo')
    'ufo'
    >>> path2Extension('/xxx/yyy/zzz/Agency_FB-Compressed.TTF')
    'ttf'
    """
    return path.split('.')[-1].lower()
