Chapter

Q1

Q2

Q3

1

b

a

b

2

c

a

c

3

b

a

a

4

b

a

a

5

b

b

a

6

b

c

a

7

　b

c

a

8

a

c

a

9

b

c

b

10

c

b

b

11

　c

a

a

12

b

b

a

13

b

a

c

14

b

c

c

15

b

a

c

16 

　c

b

a

17

b

c

a

18

b

b

a

19

b

c

a

20

c

a

b

21

b

a

a

22

　a

b

c