Помогите пожалуйста с английскимЗамените подлежащее,выраженное существительным, личным

Помогите пожалуйста с английским

Поменяйте подлежащее, выраженное существительным, личным местоимением.

Эталон: My aunt is a teacher. She is a teacher.

1. This test is difficult.

2. These tests are easy.

3. That computer is modern.

4. Those computers are not new.

5. My brother is a doctor.

6. His sister is a student.

7. Nick and I are good friends.

8. Bob and Tom are their children.

9. Gene and Ann are at school.

10. His uncle is an artist.