Explanation
One of the BA's strongest arguments for using configuration over code is that configuration provides faster speed to market. Speed to market is the time it takes to deliver a product or service from conception to launch.
Speed to market is important for gaining competitive advantage,meeting customer demand, and maximizing revenue potential. Configuration provides faster speed to market than code because it allows for creating and modifying functionality in Salesforce without writing code or deploying changes. Configuration can be done by using point-and-click tools such as App Builder, Process Builder, Flow Builder, Lightning Web Components Builder, etc., which are easy to use and require less technical skills than coding. Configuration also reduces the risk of errors or bugs that may occur with code and require more testing or debugging time.
References:https://trailhead.salesforce.com/en/content/learn/modules/business-analysis-functional-requirements/

Explanation
User acceptance testing (UAT) is a type of testing that is performed by users of a system to ensure that it meets their needs. UAT is typically performed after the system has been developed and before it is released to production.
The goal of UAT is to ensure that the system is usable and meets the needs of the users. UAT can also be used to identify any defects in the system.
The following people should participate in UAT:
Business users: Business users are the people who will be using the system on a day-to-day basis. They should be involved in UAT to ensure that the system meets their needs.
Project manager: The project manager is responsible for the overall success of the project. They should be involved in UAT to ensure that the system is on track to meet the project's goals.
Key stakeholders: Key stakeholders are people who have a vested interest in the success of the project.
They may include customers, suppliers, or investors. Key stakeholders should be involved in UAT to ensure that the system meets their expectations.
User acceptance testing (UAT) is end-user testing performed in a sandbox or test environment to verify that a project or enhancement works as intended, and what was originally requested is actually being delivered. The people who should participate in UAT are business users, project manager, and key stakeholders. Business users are users who will use the solution in their daily work. They can test the solution against real-world scenarios and provide feedback on its usability and functionality. Project manager is the person who oversees the project and ensures that it meets the objectives, scope, budget, and timeline. They can coordinate the UAT activities and communicate the results to the stakeholders. Key stakeholders are people who have an interest or influence in the project outcome. They can review the UAT results and approve or reject the solution before deployment. The business analyst (BA) is not a participant in UAT because their role is to facilitate and support the UAT process, not to test the solution themselves. References:
https://trailhead.salesforce.com/en/content/learn/modules/user-acceptance-testing-video/learn-about-user-accept

When a business analyst finds it difficult to get a response from a subject matter expert (SME), they should escalate the concern to the SMEs' manager. This is because the SMEs' manager can help to prioritize the project, provide feedback, and ensure accountability. The business analyst should also document the communication attempts and issues, and keep the project sponsor and other stakeholders informed of the status and risks. References:
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/collaboratio

This answer states that building tooltips and discoverable content in the new console layouts is how the BA should help the EMEA sales team learn the new features after completing the user acceptance testing phase of a major update to Sales Cloud. Tooltips are small pop-up windows that provide brief explanations or instructions for a feature or a functionality when a user hovers over or clicks on an element. Discoverable content is content that is hidden until a user interacts with a trigger, such as a button, a link, or an icon.
Building tooltips and discoverable content in the new console layouts can help the BA to provide contextual and on-demand guidance and information to the EMEA sales team, and help them learn the new features at their own pace and convenience. References:
https://trailhead.salesforce.com/en/content/learn/modules/salesforce-business-analyst-quick-look/use-stakeholder

A business analyst assigned to a Service Cloud project should understand the current business processes and document the existing functionality of the customer service department. This will help them identify the gaps, pain points, and opportunities for improvement. Working with Salesforce to purchase the necessary licenses is a task for the project manager or sponsor. Managing existing Salesforce applications and activities is a task for the administrator or developer. References:
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/customer-di
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/business-pro