You should now be able to see those two chapters several times.
Post an answer here to let me know if this is (or not) the case.
I have put back slides in the file folder for those two chapters so that you do not need an internet connexion to work on them.
Students who did not attend the classes are strongly advocated to first go through the interactive lessons and upload their solutions.
Students who did not attend the classes are strongly advocated to first go through the interactive lessons and upload their solutions.