Final exam challenge instructions
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- your final exam grades have been posted on Canvas
- if you think we made mistakes, you can start a challenge.
- again, there are two types of challenges, and you can only challenge us *once*.
- your "challenge period" will end at midnight, 05/07.


- Option 1: private challenge
  -- name *at most* three questions (the question numbered from 1 to 11).
  -- email the staff mailing list with your name, NUID, and the question numbers
  -- we will re-evaluate these questions and come back to you later.
  -- scores may go either up or down.
  -- instructor will make the final decision.

- Option 2: public challenge
  -- submit a public challenge post on piazza (also send an email to the staff mailing list)
  -- instructor will publish the student's exam on piazza.
  -- This will trigger a full re-evaluation to all answers.
  -- for disagreements,
    -- there will be an open debate on piazza,
    -- and one majority vote for each disagreement.