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Count how many games were released each year (as the count column), what was the average cost of production (as the avg_cost column), and what was their average revenue (as the avg_revenue column).

Stuck? Here's a hint!

You'll need four columns:

  COUNT(...) AS count,
  AVG(...) AS avg_cost,
  AVG(...) AS avg_revenue

And you'll need to group your results by the production_year column:

GROUP BY production_year