Welcome to your interview.
The question is on your right: Defining the User Problem. 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 did you define the user problem for this project, and what research led to your solution?