Hello, Fresia. Writing from memory in long hand what I wanted to say with each slide until I had it in my head worked the best for me. Also being able to discuss in at least a general sense the theme of the missing contributions is useful.

As others have suggested, contacting the teacher is helpful. In my case, I asked the teacher exactly what my responsibilities were under the circumstances.

Finally, I assume the group project has at least some aspect of teaching students how to work together as a job skill. Learning to work together means putting aside individual ways of doing assignments in favor of what works best for everyone in the group. Pointing this out to you is akin to preaching to the choir. Even so, those who cause the stress and confusion, or worse, by waiting to begin preparation of their contribution at the midnight hour need to be told how inconsiderate they are, both by the other members of the group and by the teacher.

Good luck, Fresia.