CREATE TABLE Student (StuID INT, LName VARCHAR, Fname VARCHAR, Age INT, Sex VARCHAR, Major INT, Advisor INT, city_code VARCHAR)
CREATE TABLE Dorm (dormid INT, dorm_name VARCHAR, student_capacity INT, gender VARCHAR)
CREATE TABLE Has_amenity (dormid INT, amenid INT)
CREATE TABLE Dorm_amenity (amenid INT, amenity_name VARCHAR)
CREATE TABLE Lives_in (stuid INT, dormid INT, room_number INT)

What is the average age for each gender of student? Return a bar chart, and display from low to high by the the average of age.
SELECT Sex, AVG(Age) FROM Student GROUP BY Sex ORDER BY AVG(Age)
SELECT "Sex", AVG("Age") FROM "Student" GROUP BY "Sex" ORDER BY AVG("Age") NULLS FIRST