Answer:
5. Tu no comiste en el restaurante
2. Ella se vistió lentamente
3.Ustedes no entraron a la casa
I think
Question 10: voy
Question 11: llega
Question 12: váis
Answer: Quien
Explanation: because you can say quienes and that is plural
Answer: I can't see the picture but I suppose it's the one that says ''Nos vemos pronto'' or ''Te veo luego''