After creating Project3 in Azure DevOps, what is the first action required to meet the project's requirements?

The first action is to create a project in SonarQube. SonarQube analyzes code quality and security, and it requires a dedicated project to store and process the analysis results for Project3. Without a SonarQube project, there's no destination for the code analysis data. Modifying the build definition in Azure DevOps would come later, after the SonarQube project is ready to receive analysis results. Obtaining an authentication token from SonarQube is also a subsequent step, needed to allow Azure DevOps to securely communicate with SonarQube. Creating a service endpoint in Azure DevOps depends on having the SonarQube project and authentication details established first.