Welcome to your interview.
The question is on your right: Python CSV Parsing and Aggregation. 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.
Write a Python script to parse a large, unstructured CSV file, clean missing values, and aggregate specific metrics without relying on heavy external frameworks.