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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 download_file(file_id, file_name):
    '''Download a file from UPLOAD_FOLDER'''
    extracted_out_dir = os.path.join(app.config['UPLOAD_FOLDER'], file_id)
    return send_file(os.path.join(extracted_out_dir, file_name))