Welcome to your interview.
The question is on your right: Window Functions With Example. 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.
Describe your experience with window functions and provide an example of how you have used them in past projects.