end of lecture #3
assignment #1 task #2
assignment #1 task #3
assignment #1 task #4
assignment #1 task #5
assignment #1 task #6
assignment #1 task #7
assignment #1 extra task
end of lecture #3
end of lecture #5
assignment #2 task #1
assignment #2 task #2
assignment #2 task #3
assignment #2 task #4
assignment #2 task #5
assignment #2 task #6
assignment #2 task #7
assignment #2 task #8
assignment #2 extra task #1
assignment #2 extra task #2