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 for the relationship between average and minimum age of captains in each class, color different classes.
SELECT AVG(age), MIN(age) FROM captain GROUP BY Class
SELECT AVG("age"), MIN("age") FROM "captain" GROUP BY "Class"