SonsoftMediumSQL & Data Manipulation00:00

Welcome to your interview for the Software Engineer role at Sonsoft.
The question is on your right: Mutating Table Errors in Triggers. 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.
What are mutating table errors in Oracle triggers, and how do you resolve or avoid them in Sonsoft systems?