Using Oracle SQL Commands

Need some help with these three questions.

1. List the course number and course description of the courses with the lowest number of enrolled students. Arrange the list on course number.

2. List course number and course description for all courses that have at least one 10:30AM section. Sort by course number.

3. List the student_id and last_name of students who received a below average grade on the third quiz in section 120.

STUDENT DATABASE SCHEMA CONVERSION GRADE TYPE LETTER GRADE (PK) VARCHAR2(2) NOT NULL ER 3,2) NOT NULL NUMBER(3,0 NOT NULL NUMBER(3,0 NOT NULL VARCHAR2(30) NOT NULL NOT NULL VARCHAR2(30) NOT NULL NOT NULL GRADE TYPE CODE (PK) CHAR2) NOT NULL GRADE PONT NUMB MAX GRADE MIN GRADE CREATED BY CREATED DATE DATE MODFED BY MODFED DATE DATE CREATED BY VARCHAR2(30) NOT NULL NOT NULL VARCHAR2(30) NOT NULL NOT NULL CREATED DATE DATE MODIFIED BY MODIFIED DATE DATE GRTW GRTYP FK GRADE TYPE WEIGHT NUMBER 8,0) NOT NULL NUMBER(8,0) NOT NULL STUDENTD (PK)(FK) SECTION ID (PK)(FK) GRADE TYPE CODE (PK(FK) CHAR2) GRADE CODE OOCURRENCE (PK) NUMBER 38,0 NOT NULL NUMERIC GRADE COMMENTS CREATED BY CREATED DATE MODIFIED BY MODIFIED DATE SECTION D (PK)(FK) GRADE TYPE CODE (PK(FK) CHAR(2) NUMBER3 S ON FART OF FINAL GRADENABER3,0) DROP LOWEST CREATED BY CREATED DATE MODIFIED BY MODIFIED DATE NUMBER(8,0) NOT NULL NOT NULI NUMBER(3,0) NOT NULL NOTNLL NOT NULL VARCHAR2(30) NOTNULL NOT NULL VARCHAR2(30) NOT NULL NOT NULL NOT NULL GR GRTW FK NUMBER(3,0) NOT NULL VARCHAR2(2000) NULL VARCHAR2(30) NOT NULL DATE VARCHAR2(30) NOT NULL DATE CHAR(1) DATE NOT NULL DATE NOT NULL GRTW SECT FK STUDENT DATABASE SCHEMA CONVERSION GRADE TYPE LETTER GRADE (PK) VARCHAR2(2) NOT NULL ER 3,2) NOT NULL NUMBER(3,0 NOT NULL NUMBER(3,0 NOT NULL VARCHAR2(30) NOT NULL NOT NULL VARCHAR2(30) NOT NULL NOT NULL GRADE TYPE CODE (PK) CHAR2) NOT NULL GRADE PONT NUMB MAX GRADE MIN GRADE CREATED BY CREATED DATE DATE MODFED BY MODFED DATE DATE CREATED BY VARCHAR2(30) NOT NULL NOT NULL VARCHAR2(30) NOT NULL NOT NULL CREATED DATE DATE MODIFIED BY MODIFIED DATE DATE GRTW GRTYP FK GRADE TYPE WEIGHT NUMBER 8,0) NOT NULL NUMBER(8,0) NOT NULL STUDENTD (PK)(FK) SECTION ID (PK)(FK) GRADE TYPE CODE (PK(FK) CHAR2) GRADE CODE OOCURRENCE (PK) NUMBER 38,0 NOT NULL NUMERIC GRADE COMMENTS CREATED BY CREATED DATE MODIFIED BY MODIFIED DATE SECTION D (PK)(FK) GRADE TYPE CODE (PK(FK) CHAR(2) NUMBER3 S ON FART OF FINAL GRADENABER3,0) DROP LOWEST CREATED BY CREATED DATE MODIFIED BY MODIFIED DATE NUMBER(8,0) NOT NULL NOT NULI NUMBER(3,0) NOT NULL NOTNLL NOT NULL VARCHAR2(30) NOTNULL NOT NULL VARCHAR2(30) NOT NULL NOT NULL NOT NULL GR GRTW FK NUMBER(3,0) NOT NULL VARCHAR2(2000) NULL VARCHAR2(30) NOT NULL DATE VARCHAR2(30) NOT NULL DATE CHAR(1) DATE NOT NULL DATE NOT NULL GRTW SECT FK