SLE133 (chemistry in our world) workshop

Hi,
Currently doing SLE133 and part of our assignments are quizzes from a weekly workshop, that can only be accessed if you attend the workshop (online).
I’m wondering what the format for these are ?

Is it a link accessible from the zoom call?
What’s the time frame ?

Objectively, how hard would you say they are for anyone who has done them? i am new to chem and it’s not a strong suite.

Do you do it on call while in the class or can you do it after in your own time? I have another class directly after so a little concerned about this