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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 _compute_version_info():
 """Compute the versions of Python, pyarrow, and Ray. Returns: A tuple containing the version information. """

    ray_version = ray.__version__
    python_version = ".".join(map(str, sys.version_info[:3]))
    pyarrow_version = pyarrow.__version__
    return ray_version, python_version, pyarrow_version