Table schema:
CREATE TABLE ENROLLED_IN (Grade VARCHAR, StuID VARCHAR); CREATE TABLE STUDENT (city_code VARCHAR, StuID VARCHAR); CREATE TABLE GRADECONVERSION (gradepoint INTEGER, lettergrade VARCHAR)

Question: 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"