If one member of the team is stuck, the team is stuck. Once the time begins, it will not be stopped. If the judge asks you to repeat or to clarify your answer, it counts against your time. Speak loudly and clearly. Timing is critical.
Students responding at the buzzer can finish and be scored.
You should repeat the problem for each team. You may answer questions during the two minutes thinking period, but time continues. One point for each common response and five points for each creative. Tough as nails, cold as ice, happy as a lark, blind as a bat, etc. Any usual expressions heard in everyday speech.