2. The signed word is (a)   .

3. The signed word is (a)   .

4. The signed word is (a)   .

5. The signed word is (a)   .

6. The signed word is (a)   .

7. The signed word is (a)   .

8. The signed word is (a)   .

9. The signed word is (a)   .

10. The signed word is (a)   .