Welcome to your interview.
The question is on your right: Model Churn From Session Data. 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.
How would you mathematically model customer churn for connected fitness subscription services if you only had access to active session data?