Change the following sentences from singular to plural or from plural to singular as in the examples?

Change the following sentences from singular to plural or from plural to singular as in the examples. 1. She is a beautiful lady. . 2. A book is a good friend. . 3. A small car is a great vehicle. . 4. She is a smart girl. . 5. It is an old church. . 6. Is this man a worker? ? 7. Is he a nice character? ? 8. These pants belong to those women. . 9. Are the students in the classroom? ? 10. These glasses aren't for those women. . 11. Are the bottles on the table? ? 12. The brush is under the chair. . 13. I am not a famous woman. . 14. The pencils aren't in the boxes. . 15. I like those barbies. . .