Read the Scenarios carefully: 1. Traffic Signal Control System Consider the development of a software system to control traffic signals. The system must manage signal switching based on timing and a queue mechanism. Additionally, it should use sensors to detect whether cars are waiting at a red signal, dynamically adjusting signal timings based on the traffic flow. 2. Web-Based Business Promotion Application Imagine developing a web-based application aimed at assisting entrepreneurs in opening a new business and promoting products online. Users can create accounts, add products, utilize Google listing services, and publish on social media. The application also features live chat support for user assistance. 3. E-Learning System Consider the development of an E-Learning system with features such as lecture and study material uploads, assignment submission, online attendance tracking, and testing functionalities. The system should manage different user accounts for teachers, students, and administrators.