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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 get_version(root):
 """ Load and return the contents of version.json. :param root: The root path that the ``version.json`` file will be opened :type root: str :returns: Content of ``version.json`` or None :rtype: dict or None """

    version_json = os.path.join(root, 'version.json')
    if os.path.exists(version_json):
        with open(version_json, 'r') as version_json_file:
            return json.load(version_json_file)
    return None