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If you encounter any technical problem with the course (i.e., a link or video is not working, some feature is not appearing as it should, etc.), please contact and click on "Ask us".

If you encounter a mistake in the content (i.e. , or you disagree with the answer given on a quiz or exercise), please post in the Discussion forum (tab at the top of the window in the course website), and put the word STAFF in the title/subject line to help us identify and address your issue promptly.