CREATE TABLE Has_Allergy (StuID NUMBER, Allergy VARCHAR2)
CREATE TABLE Allergy_Type (Allergy VARCHAR2, AllergyType VARCHAR2)
CREATE TABLE Student (StuID NUMBER, LName VARCHAR2, Fname VARCHAR2, Age NUMBER, Sex VARCHAR2, Major NUMBER, Advisor NUMBER, city_code VARCHAR2)

What are the last names and ages of the students who are allergic to milk and cat? Plot them as bar chart.
SELECT LName, Age FROM Student WHERE StuID IN (SELECT StuID FROM Has_Allergy WHERE Allergy = "Milk" INTERSECT SELECT StuID FROM Has_Allergy WHERE Allergy = "Cat")
SELECT "LName", "Age" FROM "Student" WHERE "StuID" IN (SELECT "StuID" FROM "Has_Allergy" WHERE "Allergy" = "Milk" INTERSECT SELECT "StuID" FROM "Has_Allergy" WHERE "Allergy" = "Cat")