text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE student (city_code VARCHAR, age INTEGER)
  ### Question:
  Find the number and average age of students living in each city.
  ### Answer:
  SELECT COUNT(*), AVG(age), city_code FROM student GROUP BY city_code