Chapter

Q1

Q2

Q3

1

b

b

a

2

c

a

b

3

a

a

b

4

c

b

b

5

c

b

c

6

a

b

b

7

b

c

a

8

　c

b

c

9

b

b

c

10

b

c

a

11

c

c

a

12

c

b

b

13

c

a

a

14

　a

b

a

15

b

a

c

16 

c　

b

c

17

c

b

a

18

c

a

a

19

a

b

c

20

　c

b

a

21

a

b

b