Chapter

Q1

Q2

Q3

1

b

a

b

2

a

b

c

3

c

b

a

4

b

b

a

5

a

b

a

6

　a

b

b

7

b

a

b

8

c

b

a

9

b

c

b

10

c

b

c

11

　c

c

a

12

c

a

c

13

c

a

b

14

a

b

b

15

a

b

c

16 

a

b

c

17

b

a

c

18

　b

a

c

19

c

b

a

20

a

c

b

21

a

b

c

22

　b

a

a

23

a

b

a

24

a

b

a

25

b

c

b