1. The document introduces set language and notation. 2. It defines basic set operations like union, intersection, complement and Cartesian product. 3. Examples are provided to illustrate set operations and relations between sets using set builder, roster and function notations.

1. Set Language and Notation
By Keartisak Monchit Mathematics Department Benchamaratrangsarit School
! " #
$ ! P
%& P '
{ 10}P prime numbers lessthan
{2,3,5,7}P
{ / , 10}P x x is prime x
( ) *
o { / a positive integer}N x x is +
o { 1,2,3,4,...}N $
1 , 3 , 0 , 5N N N N 1 belongs to N
A ( )n A
{ 2,4,6,...,20 }A ( ) 10n A
{ 1,2,3,4,... }B ( ) (infinity)n B
,* { ' '}S letters of the word book
$ S
- S
{ , , }S b o k
( ) 3n S

2. Page 2
. '% { 1, 1, 2, 2, 2, 3 } { 1, 2, 3 }
/ { 1, 2, 3, 4, 5 } { 4, 1, 5, 2, 3 }
,* { / 1 18 }A x x is an even number between and
$ A
- A
{ 2, 4, 6, 8, 10, 12, 14, 16 }A
( ) 8n S
,* 2 2 2 2 2
{ 1 , 2 , 3 , 4 , 5 }B
0 B 1
23 B 4
{ 1 , 4 , 9 , 16 , 25 }B 56 9 B
2
{ / ; 5 }B x x n n I and n
,* { 3 , 4 , 5 , 6 }T
1
3
T 1
23 T 4
( A B 7 A B * 3
$ { letters from the word 'parallel' }A
{ letters from the word 'apparel' }B
A B 1
A B '

3. Page 3
{ , , , , }A p a r l e
{ , , , , }B a p r e l
A B * A B
$ { x/x is a digit from the phone number 92883388 }C
{ x/x is a digit from the phone number 92382238 }D
C D 1
- 3 - { 2 , 4 , 6 , ... ,100 }A
{ 5 , 10 , 15 , ... ,1000 }B
{ x/x = 2n , n I 10 }C and x
2
{ x/x I 100 }D and x
{ 1 , 3 , 5 , ... }A
{ 1 , 4 , 9 , 16 , 25 , ... }B
{ x/x = 2n 1 , n I }C
2
{ x/x I 100 }D and x
!
" #
( & ( ) 0n
- 3 2 { / 2 5 }A x x I and x
{ / 2 10 }B x x I and x
{ / , 5 x<1 }C x x I x and
"
( + * U *

4. Page 4
' ,* { 1 , 2 , 3 , ... , 10 }U
{ x / x less than 5 }A
{ x / x is odd number }B
( { 1 , 2 , 3 , 4 }A
{ 1 , 3 , 5 , 7 , 9 }B
* A B A
B A B A B A B
A B A B A # B
A B
{ 3 , 5 , 7 } and { 1 , 3 , 5 , 7 , 9 }A B
A B A B
( and ( )A B A B A B
{ 1 , 3 , 5 , 7 , ... } and { x / x I }C D
C D C D
( and ( )C D C D C D
{ x / x is an even number } and { x / x is an integer }E F
E F E F
( and ( )E F E F E F
{ x / x is a root of (x 1)(x 3) = 0 } , { 1 , 2 , 3 , 4 }P Q
{ 4 , 3 , 2 , 1 } and S { 1 , 3 , 5 }R
8 P Q R
' { 1 , 3 }P
( and ( )P Q P Q P Q
and ( )Q R R Q Q R
and ( )P S P S P S

5. Page 5
$ % % 2 * A
/ 2* A A
9 A B B A A B
: A B B C A C
; A B x x A x B
" &
{ 1 , 2 }A
A ' , {1} , {2} , {1,2}
. A : 2
2
. A 9 2
2 < %
{ 1 , 3 , 5 }B
B ' , {1} , {3} , {5} , {1,3} , {1,5} , {3,5} , {1,3,5}
. B = 3
2
. B > 3
2 < %
{ 1 , {1} }C
C ' , {1} , {{1}} , {1,{1}}
. A : 2
2
. A 9 2
2 < %
{ a , b , c , d }D
D ' , {a} , {b} , ... ,{ a , b , c , d }
. D %? 4
2
. A %; 4
2 < %
! % . A 2n
( )n A n
/ . A 2n
<% ( )n A n

6. Page 6
#
,* A @ A ( )P A
A ( ) { / }P A x x A
{ 1 , 2 }A
A ' , {1} , {2} , {1,2}
( ) { , {1} , {2} , {1,2} }P A
{ 1 , 3 , 5 }B
B ' , {1} , {3} , {5} , {1,3} , {1,5} , {3,5} , {1,3,5}
( ) { , {1} , {3} , {5} , {1,3} , {1,5} , {3,5} , {1,3,5}}P B
{ 1 , {1} }C
C ' , {1} , {{1}} , {1,{1}}
( ) { , {1} , {{1}} , {1,{1}}}P C
{ }D
D ' , { }
( ) { , { }}P D
{ 0 , 1 , {2}}E
E ' , {0}, {1}, {{2}}, {0,1}, {0,{2}}, {1,{2}}, {0,1,{2}}
( ) { , {0}, {1}, {{2}}, {0,1}, {0,{2}}, {1,{2}}, {0,1,{2}}}P E
! ' { , }A a b ( ( ) { ,{ },{ },{ , }}P A a b a b
( ) { ,{ },{ }, }P A a b A
% ( )P A { } ( )P A
/ ( )A P A { } ( )A P A
9 ( )x P A x A
: ( ) ( )P A PP A ( ) ( )PP A PPP A
; A B ( ) ( )P A P B

7. Page 7
(
( A B A B
A B A B
{ / }A B x x A or x B
$ {1,2,3,4,5}A {2,4,6,8,10}B {4,5,6,7,8}C
( {1,2,3,4,5,6,8,10}A B
{1,2,3,4,5,6,7,8}A C
{2,4,5,6,7,8,10}B C
$ {1,3,5,7,9}A {2,4,6,8,10}B {1,2,3,4,...,10}C
( {1,2,3,4,5,6,7,8,9,10}A B C
{1,2,3,4,5,6,7,8,9,10}A C C
{1,2,3,4,5,6,7,8,9,10}B C C
$ { / }A x x I { / }B x x I {0}C
( { / 0}A B x x I and x
{ / 0}A C x x I and x
{ / 0}B C x x I and x
# % A A
/ A A A
9 A U U
: A B B A *$
; ( ) ( )A B C A B C A B C
* $

8. Page 8
? A B A B B
> A B A B
= A B A B
0 A B A C B C
%& A A B A B C
( A B A B
A B
{ / }A B x x A and x B
$ {1,2,3,4,5}A {2,4,6,8,10}B {4,5,6,7,8}C
( {2,4}A B
{4,5}A C
{4,6,8}B C
$ {1,3,5,7,9}A {2,4,6,8,10}B {1,2,3,4,...,10}C
( A B
{1,3,5,7,9}A C A
{2,4,6,8,10}B C B
$ { / }A x x I { / }B x x I {0}C
( A B
A C
B C

9. Page 9
# 1. A
2. A A A
3. A U A
4. A B B A *$
5. ( ) ( )A B C A B C A B C * $
6. if and only ifA B A B A
7. if and only of and are disjoint setsA B A B
8. If thenA B A C B C
9. andA B A A B C A B
10. if and only ifA B A B A B
11. ( ) ( ) ( )A B C A B A C 8 *$
12. ( ) ( ) ( )A B C A B A C 8 *$
) ( A A
A * U
{ / }A x x U and x A
$ {1,2,3,4,5,6,7,8}U {4,6,8}A {1,3,5,7}B
( {1,2,3,5,7}A
{2,4,6,8}B
( ) {2}A B
( )A B U
U
( ) {4,6,8}A A
( ) {1,3,5,7}B B

10. Page 10
$ { / }U x x I * { / }A x x I { / }B x x I {0}C
( { / 0} {0}A x x I or x I
{ / 0} {0}B x x I or x I
( ) {0}A B
( )A B U
{ / 0}C x x I and x
$ {1,2,3,4,5,6,7,8}U {4,6,8}A {1,3,5,7}B
( {1,2,3,5,7}A {2,4,6,8}B
( ) {2}A B ( )A B U
{2}A B {1,2,3,4,5,6,7,8}A B U
! ( )A B A B ( )A B A B
# % U
/ U
9 A A U
: A A
; ( )A A (( ) )A A
? A B B A
> ( )A B A B 8 A $
= ( )A B A B 8 A $
( A B A B
A B
{ / }A B x x A and x B
{ / }B A x x B and x A

11. Page 11
$ {1,2,3,4,5,6,7}A * {5,6,7,8,9,10}B {11,12,13}C
( {1,2,3,4}A B
{8,9,10}B A
{1,2,3,4,5,6,7}A C A
{5,6,7,8,9,10}B C B
$ {1,3,5,7,9}A {1,2,3,4,5,6,7,8,9,10}B
( A B
{2,4,6,8,10}B A
! ' A B A B
# % U A A
/ A A A
9 A B B A 3 A B
: A B A B
; A B A B
? ( )A B A A B
> A B B A
= ( ) ( ) ( )A B C A B A C
0 ( ) ( ) ( )A B C A B A C
%& ( ) ( ) ( )A B C A C B C
%% ( ) ( ) ( )A B C A C B C
+ ,
B *
*
A B + * :

12. Page 12
C A B
C A B
C A
C A B
Exercise
% 8 B 8
% ( ) ( ) ( )A B C A B A C
/ ( ) ( ) ( )A B C A B A C
A A A
C C C
B B B
A A A
C C C
B B B

13. Page 13
9 ( )A B A B
: ( )A B A B
; ( ) ( ) ( )A B C A B A C
? ( ) ( ) ( )A B C A B A C
/ ,* B 8 D
%
/
9
:
;
?
>
=
A A A
C C C
B B B
A A A
C C C
B B B
A A A
C C C
B B B
A A A
C C C
B B B
A B
C
U
1
2
34
5
6
7
8

14. Page 14
!
,*
% A B ( ) ( ) ( )n A B n A n B
/ A B B C A C ( ) ( ) ( ) ( )n A B C n A n B n C
9 A B ( ) ( ) ( ) ( )n A B n A n B n A B
: A B B C A C
( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )n A B C n A n B n C n A B n B C n A C n A B C
; ( ) ( ) ( )n A n U n A
? ( ) ( ) ( )n A B n A n A B
A B
A
B
C
A B
A B
C
A
A
A B

15. Page 15
,* , , ( ) 100 , ( ) 60 , ( ) 75 ( ) 45A U B U n U n A n B and n A B
-
% ( )n A B / ( )n A B 9 ( )n A B
: ( )n A B ; ( )n B A ? ( )n A
> ( )n B = ( )n A B 0 ( )n B A
,* , , , ( ) 100 , ( ) 29 , ( ) 23 , ( ) 18A U B U C U n U n A n B n C
( ) 15 , ( ) 10 , ( ) 9 ( ) 6n A B n A C n B C and n A B C
-
% ( )n A B / ( )n B C 9 ( )n A C
: ( )n A B ; ( )n A B C ? ( )n A B C
> ( )n A B C = ( )n A B C
A B
U
A B
C

16. Page 16
Exercise
% ,* + *
( ) 150 , ( ) 62 , ( ) 55 ( ) 11n U n A n B and n A B -
% % ( )n A B % / ( )n A B
% 9 ( )n A B % : ( )n A B
% ; ( )n B A % ? ( )n A
% > ( )n B % = ( )n A B
% 0 ( )n B A % %& ( )n A B
/ ,* + *
( ) 50 , ( ) 6 , ( ) 38 ( ) ( )n U n A B n A B and n A n B -
/ % ( )n A / / ( )n A
/ 9 ( )n A B / : ( )n B A
/ ; ( )n A B / ? ( )n A B
/ > ( )n A B / = ( )n B A
/ 0 ( )n A B / %& ( )n B A
A B
U
A B
U

17. Page 17
9 ,* + *
( ) 80 , ( ) 35 , ( ) 28 , ( ) 21 , ( ) 12 , ( ) 10n U n A n B n C n A B n B C
( ) 14 ( ) 4n A C and n A B C -
9 % ( )n A B 9 / ( )n B C
9 9 ( )n A C 9 : ( )n A B C
9 ; ( )n A B 9 ? ( )n B C
9 > ( )n A C 9 = ( )n A B C
9 0 ( )n A B 9 %& ( )n B C
9 %% ( )n A C 9 %/ ( )n A B C
9 %9 ( )n A B 9 %: ( )n B C
9 %; ( )n C A 9 %? ( )n A B C
9 %> ( )n A C B 9 %= ( )n B C A
9 %0 ( )n A B C 9 /& ( )n B A C
A B
C
U

18. Page 18

19. Page 19

20. Page 20

21. Page 21

22. Page 22

23. Page 23
Exercise 1 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
-& &
% ( * * %&
EEEEEEEEEEEEEEEEEEEEEEEEEE EE
/ ( !
EEEEEEEEEEEEEEEEEEEEEEEEEE EE
9 ( *
EEEEEEEEEEEEEEEEEEEEEEEEEE EE
: ( * < %&
EEEEEEEEEEEEEEEEEEEEEEEEEE EE
; ( < ; ;
EEEEEEEEEEEEEEEEEEEEEEEEEE EE
.& &
% 2
{ / 25 }x x I and x EEEEEEEEEEEEEE
/ { / 2 }x x n and n I EEEEEEEEEEEEEE
9 { / 5}x x I and x EEEEEEEEEEEEEE
: 3
{ / , 5}x x n n I and n EEEEEEEEEEEEEE
; 2
{ / 25 }x x I and x EEEEEEEEEEEEEE
/& &
% { 1 , 2 , 3 , 4 ,...} EEEEEEEEEEEEEE
/ { 1 , 1 } EEEEEEEEEEEEEE
9 { 1 , 2 , 3 , 4 , 5 } EEEEEEEEEEEEEE
: { sun , mon , tue , wed , thu , fri , sat } EEEEEEEEEEEEEE
; { 3, 6, 9, 12,...} EEEEEEEEEEEEEE
? { 1, 3, 5, 7, 9,...} EEEEEEEEEEEEEE
> { 1, 8, 27, 64,...} EEEEEEEEEEEEEE
= { 5, 10, 15, 20,..., 100 } EEEEEEEEEEEEEE

24. Page 24
Exercise 2 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
-& &
% " / : = %? E %&/: # EEEEEEEEEEEEEE
/ " % 9 ; > E# EEEEEEEEEEEEEE
9 " / : ? " = %&%/ E# %&/: # EEEEEEEEEEEEEE
: " " # "" ## """ ### E# EEEEEEEEEEEEEE
; " 3 <
F 3 G% # EEEEEEEEEEEEEE
? " 3 F 3 H%&# EEEEEEEEEEEEEE
> " 3 F 3/
H%&&#
= " &% / " % / # " 9 : ; E# #
0 " 3 F 3 I/ H%&#
%& " 3 F 3 I4 ; . H;&#
%% " 3 .F 3 H&# EEEEEEEEEEEEEE
%/ " 3 F 3/
H%&#
%9 " 3 F 3 H% 3 G; #
%: " 3 F 3 I9
.#
%; " 3 .F 93 4 % I&#
%? " 3 @F 3 #
%> " 3 F 3/
4 /3 J % I&#
%= " 3 .F 3 G%& 3 H; #
%0 " "%# "% /# "% / 9# E#
/& " 3 @F 93 4 %; I&#
.& 0 1 &
{ / 2 5 }x x I and x

25. Page 25
Exercise 3 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
# - &
% " 3 F % H3 %&# " / 9 : E %&# EEEEEEE
/ " 3 F 3/
4 3 I&# " 3 .F 3 4 % I&# EEEEEEE
9 " 3 F 3 I/ 4 % .# " % 9 ; > E# EEEEEEE
: " 3 F 3 I/ # " / : ? = E# EEEEEEE
; " 3 F 3 I 9
.# " % = /> ?: E# EEEEEEE
? " 3 .F 3/
I% # " % 4 % # EEEEEEE
> " 3 F 3/
H%&# " &% / 9 # EEEEEEE
= " 3 F 3 H% 3 G; # " # EEEEEEE
0 " 3 F 3 I/ J % .# " % 9 ; E# EEEEEEE
%& " # " # EEEEEEE
# . &
2" 34- * . * /* 5* 1* 6* 7* 8* 9* -:;
% I" 3 F 3 J / H= # ( IEEEEEEEE
/ I" 3 F 3 J / G> # ( IEEEEEEEE
9 I" 3 F 3/
J % I%&# ( IEEEEEEEE
: 8I" 3 F 3/
J / H/&# ( 8IEEEEEEEE
; 2I" 3 F 3 J / I3 4 / # ( 2IEEEEEEEE
2" 34 < " " ;
? -I" 3 F /3 H9&# ( -IEEEEEEEE
> ,I" 3 F 3 # ( ,IEEEEEEEE
= 6I" 3 F 3/
J % H/&# ( 6IEEEEEEEE
0 I" 3 F 3 J / I/ J 3 # ( IEEEEEEEE
%& KI" 3 F 3 7 %&# ( KIEEEEEEEE

26. Page 26
Exercise 4 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
# - &
% " % 9 ; # " % / 9 : E %&#
/ " &/ : # " 3 F 3 .#
9 " ; %&%; /&# " % / 9 E %&&#
: " # " & " ##
; " % / 9 #
# . * &
% I" % 9 # ( @ IEEEEEEEEEEEEEE
/ I" &/ # ( @ IEEEEEEEEEEEEEE
9 I" # ( @ IEEEEEEEEEEEEEE
: 8I" % # ( @8 IEEEEEEEEEEEEEE
; 2I ( @2 IEEEEEEEEEEEEEE
? I" "%# # ( @ IEEEEEEEEEEEEEE
> I" % "%## ( @ IEEEEEEEEEEEEEE
= I" % # ( @ IEEEEEEEEEEEEEE
0 8I" % 9 ; # ( @8 IEEEEEEEEEEEEEE
%& 2I" " ## ( @2 IEEEEEEEEEEEEEE

27. Page 27
Exercise 5 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
# - = 0* 2" = 0 &
.
% " % / 9 # " % 9 ; > #
/ " ; ? > # " % / 9 E %&#
9 " 3 F 3 G;# " 3 F 3 G%&#
: " % / 9 # " 9 / % #
; " 3 F 3 .# " 3 F 3 #
# . = 0* 2" = 0 &
.
% " % / 9 : # " / : ? = %&#
/ " 9 ; > # " % / 9 E %&#
9 " 3 F 3 G9 # " 3 F 3 G= #
: " % / 9 # " 9 / % #
; " 3 F 3 .# " 3 F 3 #
# / # >= 0* = 0?

28. Page 28
Exercise 6 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
# - A * 2" A U &
A U A
% " % / 9 # " % / 9 E %&#
/ " / : ? = # " % / 9 E %&#
9 " 3 F 3 G; # " 3 F 3 .#
: " < % < / < 9 E# " 3 F 3 #
; " 3 F 3 .# " 3 F 3 #
? " 3 F 3 J
# " 3 F 3 #
> "&# " 3 F 3 #
= " 3 F 3 <
&# " 3 F 3 #
# . =, 0 * 2" = 0 &
4
% " % / 9 : # " : ; ? #
/ " ; ? > = # " / : ? #
9 " % / 9 E %&# " > = 0 #
: " : ; ? # " > = 0 %&%% #
; " 3 F 3 .# " 3 F 3 #
# /# ) >A A B ?

29. Page 29
Exercise 7 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
# - + &
% / 4
9 4 :
; L
# . @ &
% / 9
EEEEEEEEE EEEEEEEEE EEEEEEEEE
: ;
EEEEEEEEE EEEEEEEEE
# / &
% / < 9 < <
B
A
B
A
B
A
B
A
B
A
A
B
B
AA
B
AB
AA
B
A

30. Page 30
Exercise 8 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
ABCDEFGHIDJKLMNOPQDRJBSBTUVWJBXWIBDWJYZUM[
% MNOPQRSMTUVWTMXYWZR;&[MV]PQRSM[^_`abc`Qd9&[M V]PQRSMebfbVNWOgf/&[M
MNOPQRSMhRYiZjV]PQRSMhNkWcVWl_b; [M mnioUljb
MNOPQRSMhRYV]PQRSMhNkWcVWl_bZR [M A 2
MNOPQRSMhRYV][^_`abc`QdVSjbWPoRSlZR [M
MNOPQRSMhRYV]ebfbVNWOgfVSjbWPoRSlZR [M
/ MNOPQRSMZ : TUVWTMXYWZR:; [MV]PpjMqr`]Vp/; [M V]PpjM]bcPO`]Vp/&[M
V]PpjMhNkWqr`]Vpspn]bcPO`]Vp%&[M mnioUljb
MNOPQRSMhRYV]PpjMqr`]VpVSjbWPoRSlZR [M -
MNOPQRSMhRYiZjV]PpjMhNkWcVWVSjbWZR [M
9 OtbTMomtbMlMcZb_OuVW spn PhjbON]9& /; spn= `bZptboN]
mnioUljb mtbMlMcZb_OuVW PhjbON]
mtbMlMcZb_OuVW 4 PhjbON]
vTU shMmtbMlMcZb_OuVWPw`
: mbOQxyhRYOtbTMovTU + I%/& I;& I:; I:& I%&
I= I> spn I; mnioUljb
IEEEEEEE
z4 {IEEEEEEE
; mbOuUVhRY: L
IEEEEEEE +
z 4 {IEEEEEE

31. Page 31
Exercise 9 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
ABCDEFGHIDJKLMNOPQDRJBSBTUVWJBXWIBDWJYZUM[
DJULMN- % OtbTMo + I=& I9; I:& I%&
mnioUljb % % IEEE
% / L
IEEE
/ OtbTMo + I%&& I9= I:/ I>9
mnioUljb % % IEEE
% / 4 IEEE
% 9 4 L
IEEEE
DJULMN. % OtbTMomtbMlMcZb_OuVWPw` spn Py|M %/ %? spn/=
`bZptboN]
mnioUljbmtbMlMcZb_OuVW 4 PhjbON]
mtbMlMcZb_OuVW 4 PhjbON]
/ mbOObQcV]}bZMNOPQRSMmtbMlM=&[MhRYV]PQRSM[^_`abc`QdTQ~V[VZ•_lP`VQd
•]ljbZRMNOPQRSMhRYV]PQRSM[^_`abc`Qd:; [M spnZRMNOPQRSMhRYV]PQRSM
[VZ•_lP`VQd;/ [M
mnioUljbMNOPQRSMhRYV]PQRSMhNkW[^_`abc`Qdspn[VZ•_lP`VQdZR [M
MNOPQRSMhRYV]PQRSM[^_`abc`QdP•RSWVSjbWPoRSlZR [M
MNOPQRSMhRYV]PQRSM[VZ•_lP`VQdP•RSWVSjbWPoRSlZR [M

32. Page 32
Exercise 10 : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
ABCDEFGHIDJKLMNOPQDRJBSBTUVWJBXWIBDWJYZUM[
DJULMN- % OtbTMo + I%&& I:& I;& I/&
mnioUljb % % IEEE
% / L
IEEE
/ OtbTMo I%%& I?& I:; I:&
I/& I%; I%&
mnioUljb / % I
/ / z < {I
/ 9 z < {I
DJULMN. vMObQcV]uVWMNOPQRSMNkMZN€SZaXOfb`VMypbSTUVWTMXYW•]ljb
9> [McV]•jbMl_b[^_`abc`Qd
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33. Page 33
Post Test : Sets and notation
Mathematics Department / Benchamaratrangsarit School
Name ………………………..……..……. No. ………. Class ….……
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34. Page 34