Peer review

https://youtu.be/rOCQZ7QnoN0

Answer the Following Questions

1.  Who can be peer reviewers, and what's another name for them?
2. From the steps described in this video, can you list the steps illustrating the peer review process, starting with the submission of a researcher's manuscript and ending with the publication of that article? 
3.  There's a line in this video, which says: "Rejection is common".  Why do you think that rejections are actually common occurrences in the peer review process, and how do you think they influence the quality of publications overall?
4.  Do you think the peer review process contributes to publication bias OR prevents publication bias?  Explain your reasoning for why you think so.