Given the talents of each student, the best fit for their roles would be:
- Rahul as the facilitator: He ensures everyone is heard, which is essential for facilitating group discussions.
- Marina as the notetaker: She listens attentively and can capture ideas in writing, making her the best choice for this role.
- Nicole as the timekeeper: Her ability to stay focused no matter how busy she gets makes her suitable for keeping track of time during group activities.
Therefore, the best assignment of roles would be Rahul as the facilitator, Marina as the notetaker, and Nicole as the timekeeper.