Welcome to your interview.
The question is on your right: Battery Stack Reasoning. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
What kind of batteries are in a Tesla Model S, how are the battery stacks arranged, and how would you arrange them to double the voltage?