Please help me out with these 4 questions using the attached article

Please help me out with these 4 questions using the attached article.1) What is the objective of this study? Why is this study significant? (250 word limit)2) What methods or tools were used to conduct this study? Did the methods adequately test the hypothesis or answer the objectives? Why or why not?(250 word limit)3) What are the most important results of this paper?(250 word limit)4) What are the author’s conclusions and do the data support them? Are there alternative explanations that fit the data? (250 word limit)