If you managed to solve the problems then I think you could upload them, maybe prof. Spognardi will discuss some solutions in class just as he did with the classwork. Otherwise, I don't think they are mandatory.
I completed the sorting of 5 numbers in class and sent it right away as I thought it was classwork. As for the 9 marbles one, I didn't manage to hear it in class. After reading the problem at home, I tried to solve it but no matter how I "used the scale" my most optimal solution required at least 4 measurements so I started to doubt if it could be done in 3. I looked it up and found out that it was actually solvable in 3 measurements using a piece of logic which I hadn't considered. Since I looked it up I am not going to upload an answer for it.
By the way, I just typed my name in the team name space.