Need you to summarize these articles every article in 300 words.
You need to focus on everything and write everything in the article and it should be on an A-level
Articles:
1. Toward Reference Models for Requirements Traceability by Balasubramaniam Ramesh and Matthias Jarke
2. Empirical research in requirements engineering: trends and opportunities by Talat Ambreen, Naveed Ikram, Muhammad Usman and Mahmood Niazi
3. Preventing Defects: The Impact of Requirements Traceability Completeness on Software Quality by Patrick Rempel and Parick Mader
4. A Spiral Model of Software Development and Enhancement by Barry W. Boehm
Required Words - 1200 Words [every article in 300 words]