Need psychology help with Psychology Questions about how children interact with each other during the school day

1. A psychologist is interestedin learning more about how children interact with each other during the schoolday. The psychologist is particularly interested in discovering the ways inwhich children behave when they donot think they are being watched. What research method would be best used toconduct this type of research, and why? What ethical concerns might be an issuein this type of research?2.As a researcher, I aminterested in learning whether or not there is a connection between sleep andtest scores. I want to know if an increase in sleep improves test scores, forexample. What type of research method would I use, and why? What ethicalconcerns might present an issue when conducting this type of research?3. If I want to research whetheror not a new medication has an effecton depression, and I want to compare the medication against aplacebo, what research method might I use, and why? What ethical concerns mightbe an issue in this type of research?