This assignment requires students to understand the principles and practices of mixed methods design in research. The selected articles provide insights into the use of mixed methods in studying chronic obstructive pulmonary disease (COPD) and its impact on patients. Students are expected to critically evaluate the studies, analyze the data, and provide a summary of the key findings. The assignment also requires students to discuss the advantages and limitations of mixed methods design in research, and to suggest potential applications in real-world settings.