Such questions are made for enhancing your creative writing skills and so, you should attempt them on your own. However, here are a few points that will help you frame your answer.
- Deciding to write a letter to the principal of the school regarding the same.
- Asking the principal to install CCTV cameras in the corridors and classrooms.
- Consoling your friend and ask him/her how you can help.
- Cheer up your friend with some light humor or a chocolate.
- Talk to your class teacher about the same and request her to take the required action.
- Suggest your class monitor to keep an eye on the students.
Hope this helps:)