Welcome to your interview.
The question is on your right: Investigating Sudden Churn Increase. 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.
If our customer churn rate increased suddenly, what steps would you take to investigate the cause?