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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_answers_for_student(student_item):
 """ Retrieve answers from backend for a student and question Args: student_item (dict):
 The location of the problem this submission is associated with, as defined by a course, student, and item. Returns: Answers: answers for the student """

    submissions = sub_api.get_submissions(student_item)
    if not submissions:
        return Answers()

    latest_submission = submissions[0]
    latest_answer_item = latest_submission.get('answer', {})
    return Answers(latest_answer_item.get(ANSWER_LIST_KEY, []))