Please answer as Q&A only:1. When designing studies involving human subjects, ethical considerations are vital. Identify a primary research study and discuss which ethical considerations were observed. Discuss how ethical considerations in research are similar to ethical considerations when providing health care services.2. Select a peer-reviewed primary research study. Identify the dependent and independent variables and evaluate the kinds of extraneous variables that you think could have affected the relationships between the independent and dependent variables. What could be done to control for extraneous variables in the study you identified? Discuss the importance of anticipating, identifying, and controlling extraneous variables.