This document provides instructions for Assignment #4 for the Software Engineering-II course. Students are asked to write a 3-4 page report summarizing how structural diagrams are used to represent web applications, including class, object, component, deployment, and package diagrams. The report should discuss how concepts like association, dependency, generalization, aggregation, and composition are depicted for web applications. Students must cite their sources, write the report in their own words, and submit it individually before the due date and time.