Your question is Power Analysis for Experiment Planning. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are planning an experiment and need to decide how much traffic to allocate before launch. The team wants to know how power analysis should shape the design.
How would you think about power analysis when planning an experiment?