diff --git a/a.sql b/a.sql
index e279c74..e62681a 100644
--- a/a.sql
+++ b/a.sql
@@ -1,4 +1,4 @@
--- What are the names (first name, last name) of all the students?
+--What are the names (first name, last name) of all the students? [72]
 
 select firstName, lastName
 from Students
\ No newline at end of file
diff --git a/b.sql b/b.sql
index a5db20f..2dab992 100644
--- a/b.sql
+++ b/b.sql
@@ -1,3 +1,5 @@
+--Same as in a) but produce a sorted listing. Sort first by last name and then by first name.
+
 select firstName, lastName
 from Students
 order by lastName, firstName
\ No newline at end of file
diff --git a/c.sql b/c.sql
index 1a4b02f..94ea555 100644
--- a/c.sql
+++ b/c.sql
@@ -1,3 +1,5 @@
+--Which students were born in 1975?
+
 select firstName, lastName
 from Students
 where pNbr like '1975%'
\ No newline at end of file
diff --git a/d.sql b/d.sql
index ed901c3..952ec1a 100644
--- a/d.sql
+++ b/d.sql
@@ -1,3 +1,6 @@
+--What are the names of the female students, and which are their person numbers? 
+--The next-to-last digit in the person number is even for females[26]
+
 select firstName, pNbr
 from Students
 where substring(pNbr, LENGTH(pNbr) -1, 1) % 2 = 0
\ No newline at end of file
diff --git a/e.sql b/e.sql
index 3c37edf..4954385 100644
--- a/e.sql
+++ b/e.sql
@@ -1,2 +1,4 @@
-select distinct pNbr
+--How many students are registered in the database?
+
+select count(*)
 from Students
\ No newline at end of file
diff --git a/f.sql b/f.sql
index 83cc0ed..0855300 100644
--- a/f.sql
+++ b/f.sql
@@ -1,3 +1,6 @@
+--Which courses are offered by the department of Mathematics
+--(course codes FMAxxx)? [24]
+
 select courseName
 from Courses
 where courseCode like '%FMA%'
\ No newline at end of file
diff --git a/g.sql b/g.sql
index 4b56fd6..fef07cb 100644
--- a/g.sql
+++ b/g.sql
@@ -1,3 +1,5 @@
+--Which courses give more than five credits? [21]
+
 select courseName
 from Courses
 where credits > 5
\ No newline at end of file
diff --git a/h.sql b/h.sql
index 6dbec39..03bcd97 100644
--- a/h.sql
+++ b/h.sql
@@ -1,3 +1,6 @@
+--Which courses (course codes only) have been taken by the student with person 
+--num-ber 790101-1234? [7]
+
 select courseCode
 from TakenCourses
 where pNbr = '790101-1234'
\ No newline at end of file
diff --git a/i.sql b/i.sql
index 36256ef..80149aa 100644
--- a/i.sql
+++ b/i.sql
@@ -1,3 +1,5 @@
+--What are the names of these courses, and how many credits do they give?
+
 select courseName, credits, courseCode, pNbr
 from Courses
 join Students on Students.pNbr
diff --git a/j.sql b/j.sql
index 82e5a28..707adcb 100644
--- a/j.sql
+++ b/j.sql
@@ -1,3 +1,5 @@
+--How many credits has the student taken?
+
 select sum(credits) as totalSum
 from Courses
 join Students on Students.pNbr
diff --git a/k.sql b/k.sql
index bd15b22..3e356b1 100644
--- a/k.sql
+++ b/k.sql
@@ -1,3 +1,5 @@
+--Which is the student’s grade average on the courses that he has taken?
+
 select avg(TakenCourses.grade) as averageGrade, Students.pNbr
 from TakenCourses
 join Students on TakenCourses.pNbr = Students.pNbr
diff --git a/l.sql b/l.sql
index d23539e..95c0c48 100644
--- a/l.sql
+++ b/l.sql
@@ -1,3 +1,5 @@
+--Same questions as in questions h)-k), but for the student Eva Alm. [5]
+
 select firstName, lastName, avg(TakenCourses.grade) as averageGrade, TakenCourses.courseCode, Courses.courseName, sum(Courses.credits) as totalCredits
 from TakenCourses
 join Students on TakenCourses.pNbr = Students.pNbr
diff --git a/m.sql b/m.sql
index f873fd8..4e01540 100644
--- a/m.sql
+++ b/m.sql
@@ -1,4 +1,6 @@
-select distinct firstName
+--Which students have taken 0 credits? [16]
+
+select firstName, lastName
 from Students
 left join TakenCourses on Students.pNbr = TakenCourses.pNbr
 where TakenCourses.pNbr is null
\ No newline at end of file
diff --git a/n.sql b/n.sql
index d6172ce..c979285 100644
--- a/n.sql
+++ b/n.sql
@@ -1,3 +1,6 @@
+--Which student has the highest grade average? Advice: define and use a view that
+--gives the person number and grade average for each student.
+
 DROP VIEW IF EXISTS StudentsAverages;
 
 CREATE VIEW StudentsAverages AS
diff --git a/o.sql b/o.sql
index 1d82c19..48d7f0d 100644
--- a/o.sql
+++ b/o.sql
@@ -1,3 +1,6 @@
+--List the person number and total number of credits for all students.
+--Students with no credits should be included in the list! [72]
+
 DROP VIEW IF EXISTS StudentsCredits;
 
 CREATE VIEW StudentsCredits AS
diff --git a/p.sql b/p.sql
index eb58a4a..80c1b23 100644
--- a/p.sql
+++ b/p.sql
@@ -1,7 +1,9 @@
+--Same question as in question o) but with names instead of person numbers.
+
 DROP VIEW IF EXISTS StudentsCredits;
 
 CREATE VIEW StudentsCredits AS
-SELECT Students.firstName, sum(credits) as totalCredits
+SELECT Students.firstName, Students.lastName, sum(credits) as totalCredits
 FROM Students
 JOIN TakenCourses ON Students.pNbr = TakenCourses.pNbr
 JOIN Courses ON TakenCourses.courseCode = Courses.courseCode
diff --git a/q.sql b/q.sql
index 960e784..45b6dc2 100644
--- a/q.sql
+++ b/q.sql
@@ -1,3 +1,5 @@
+--Is there more than one student with the same name? If so, who are these students? [7]
+
 SELECT firstName, lastName, count(*) as nbrOfStudents
 FROM Students
 GROUP BY firstName, lastName