Need some more help with Oracle SQL commands

List the student id and name of students who have taken the same course more than once. Arrange by last name then first name.

List the first and last names of the students who have enrolled in the fewest Sophomore (200 level) classes. Order by last name of the student

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

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) NUMBER?3 S ON FART OF FINAL GRADENABER?3,0) 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 FKI 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) NUMBER?3 S ON FART OF FINAL GRADENABER?3,0) 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 FKI 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