QualtricsHardSQL & Data Manipulation00:00

Welcome to your interview for the Solutions Architect role at Qualtrics.
The question is on your right: Schema for Survey and Transaction 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. You have three graded attempts to score 7/10 or better.
How would you structure a database schema to store and aggregate high-volume survey response data alongside transactional customer data?