Read Gray, J.R. & Grove, S. K., (2021). Burns and Grove's the practice of nursing research: Appraisal, synthesis, and generation of evidence (9th ed.). St. Louis: Elsevier Saunders Chapter 1 and answer the following questions.  The textbook explains the significance of research in establishing evidence-based practice.  Four foci are disussed description, explanation, prediction and control.  Briefly define these foci and select one of them to illustrate your understanding in an example.  APA 7th edition, 3 references (within 5 years)