The student includes four supporting documents that are relevant and contemporary, all published within the last three years, enhancing the analysis of Spotify's pricing changes and customer loyalty. However, the student fails to clearly label the supporting documents, which needs revision. The documents provide a range of ideas and views, and the student has effectively highlighted relevant parts to support the IA. While the supporting documents are in-depth and pertinent, the student does not assess their validity and reliability, which is an area for improvement.