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Introduction
Final quiz
12. Question 9
Summary

Instruction

Good job. We're getting close to the end now with question 9/11.

Exercise

For each procedure, show the name, score, price, category, the average price in its category (as avg_price), the average score in its category (as avg_score) and its rank in the category based on its score (procedure with the highest score should get rank 1). Multiple procedures may share the same rank, but don't allow gaps in numbering.