CREATE TABLE captain (Captain_ID INT, Name TEXT, Ship_ID INT, age TEXT, Class TEXT, Rank TEXT)
CREATE TABLE Ship (Ship_ID INT, Name TEXT, Type TEXT, Built_Year FLOAT, Class TEXT, Flag TEXT)

Show me a scatter plot of avg(age) and minimal age for .
SELECT AVG(age), MIN(age) FROM captain GROUP BY Class
SELECT AVG("age"), MIN("age") FROM "captain" GROUP BY "Class"