CREATE TABLE ENROLLED_IN (Grade VARCHAR(255), StuID VARCHAR(255)); CREATE TABLE STUDENT (city_code VARCHAR(255), StuID VARCHAR(255)); CREATE TABLE GRADECONVERSION (gradepoint INTEGER, lettergrade VARCHAR(255))
What is the maximum and minimum grade point of students who live in NYC?
    
SQL: SELECT MAX(T2.gradepoint), MIN(T2.gradepoint) FROM ENROLLED_IN AS T1 JOIN GRADECONVERSION AS T2 JOIN STUDENT AS T3 ON T1.Grade = T2.lettergrade AND T1.StuID = T3.StuID WHERE T3.city_code = "NYC"