Sorry....I don't know anything about this topic......maybe someone else on here can help....
How about you explain? If you have tried this exercise then you must have some idea.
What is a tesselation?
Watch the videos and answer your won question.
All of the first examples tesselate however only one of them is regular.
Answer yourself. Tell us your answers with your reasonings. And next time just put one question per post.
Please no one give guest the exact answers to this. This should be a teaching site. NOT a cheat site.