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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 set_environment_variables(json_file_path):
 """ Read and set environment variables from a flat json file. Bear in mind that env vars set this way and later on read using `os.getenv` function will be strings since after all env vars are just that - plain strings. Json file example: ``` { "FOO": "bar", "BAZ": true } ``` :param json_file_path: path to flat json file :type json_file_path: str """

    if json_file_path:
        with open(json_file_path) as json_file:
            env_vars = json.loads(json_file.read())

            export_variables(env_vars)