Please help me answer the following questions

a) What is the population of interest?

b) Describe the frame from which the sample was collected.

c) Describe the sample that was collected.

d) What is the parameter of interest in relation to the primary discovery (the first line in the STORY HIGHLIGHTS at the beginning of the article)?

e) Describe the statistic used to estimate the parameter in part (d) above.

f) What sampling approach was utilized (convenience, judgment, simple random, systematic, stratified, or cluster sample)? Explain how it can be found out.