Translate the following question to SQL: For each grade, return the grade number, the number of classrooms used for the grade, and the total number of students enrolled in the grade.

Schema: CREATE TABLE list (
    LastName TEXT   PRIMARY KEY,
    FirstName TEXT   PRIMARY KEY,
    Grade INTEGER,
    Classroom INTEGER,
    PRIMARY KEY (LastName, FirstName),
    UNIQUE (LastName, FirstName)
);

CREATE TABLE teachers (
    LastName TEXT   PRIMARY KEY,
    FirstName TEXT   PRIMARY KEY,
    Classroom INTEGER,
    PRIMARY KEY (LastName, FirstName),
    UNIQUE (LastName, FirstName)
);
user
SELECT grade ,  count(DISTINCT classroom) ,  count(*) FROM list GROUP BY grade
assistant