Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE Allergy_Type ( Allergy VARCHAR(20), AllergyType VARCHAR(20) )
TABLE: CREATE TABLE Student ( StuID INTEGER, LName VARCHAR(12), Fname VARCHAR(12), Age INTEGER, Sex VARCHAR(1), Major INTEGER, Advisor INTEGER, city_code VARCHAR(3) )
TABLE: CREATE TABLE Has_Allergy ( StuID INTEGER, Allergy VARCHAR(20) )

### Question ###
What are the last names and ages of the students who are allergic to milk and cat? Plot them as bar chart, and could you rank Y in desc order please?

### Accurate SQL ###

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") ORDER BY Age DESC