I need help: detailed explanations please!

For a research project, students are asked to study how often students at an online high school look at social media while doing schoolwork.

1.Sofie decides to develop a survey.

(a) Give an example of a question she could ask on her survey.

(b) How could Sofie select a simple random sample of students to take her survey?

(c) She gives out 80 surveys but receives only 32 completed surveys. What are the sample and population for Sofie's research?

(d) Of the 32 students who completed surveys, 16 said they use social media while doing schoolwork. If Sofie uses only the completed surveys, what conclusion could she make about the percent of all high school students who use social media while doing schoolwork? Explain.

2.Tony decides to use observation. He visits 10 students and observes them doing schoolwork at home for 30 min. If a student looks at social media during that time, he notes it.

(a) Provide an advantage of using observation.

(b) Provide a disadvantage of using observation.

(c) What are the sample and population for Tony's research?

(d) Suppose 3 of the 10 students looked at social media during the observation. What conclusion could Tony make about the percent of high school students who use social media while doing schoolwork? Explain.