The project manager should take these two actions to align customer expectations with the current situation of the project. The sprint velocity is a measure of how much work the agile team can complete in a sprint. By reviewing the updated sprint velocity with the customer, the project manager can show the impact of losing two team members on the project schedule and scope. The customer can then adjust their expectations accordingly and provide feedback on the project progress. The prioritized backlog is a list of features and requirements that the customer wants to have in the product. By asking the product owner to review the prioritized backlog with the customer, the project manager can ensure that the most valuable and important features are delivered first. The customer can also reprioritize the backlog items based on their changing needs and preferences. This way, the project manager can deliver early results that meet the customer's satisfaction.
The other options are not the best actions to align customer expectations. Asking the agile team to review and update the quality management plan with the customer is not relevant to the budget reduction or the early results. The quality management plan defines the quality standards, criteria, and methods for the project. It is not a tool for communicating the project status or scope with the customer. Reviewing the impediments log with the customer is not a good practice, as it may expose the internal issues and challenges of the agile team.
The impediments log is a record of the obstacles and problems that the agile team faces during the project. It is used by the agile team and the scrum master to identify and resolve the impediments. The customer does not need to know the details of the impediments log, as it may affect their trust and confidence in the project team. Sending a detailed project management plan to the customer is not appropriate for an agile project, as it may imply a fixed and rigid approach to the project. The project management plan is a formal document that describes how the project will be executed, monitored, and controlled. It is not suitable for an agile project, as it does not accommodate the changes and uncertainties that occur during the project. An agile project relies on frequent and informal communication, collaboration, and feedback with the customer, rather than a detailed project management plan. References:
* PMBOK Guide, 6th Edition, Chapter 6, Section 6.7, "Control Schedule"
* PMBOK Guide, 6th Edition, Chapter 13, Section 13.2, "Plan Stakeholder Engagement"
* PMBOK Guide, 6th Edition, Appendix X3, Section X3.2.2.3, "Sprint Velocity"
* PMBOK Guide, 6th Edition, Appendix X3, Section X3.2.2.4, "Prioritized Product Backlog"
* PMBOK Guide, 6th Edition, Appendix X3, Section X3.2.2.5, "Impediments Log"
* PMP Project Management Professional Exam Study Guide: 2021 Exam Update, 10th Edition, Chapter
12, Section 12.2, "Agile Project Management" 1

When a key stakeholder introduces a new requirement, it is essential for the project manager to request further clarification. This ensures that the requirement is fully understood and its impact on the project schedule can be accurately assessed. The PMBOK Guide emphasizes the importance of clear communication and understanding stakeholders' needs for successful project management1. Additionally, the PMI-PBA highlights the need for detailed requirement analysis to manage changes effectively and align them with business objectives2. References:
* Stakeholder Analysis: Pivotal Practice to Project Success | PMI1
* PMI Professional in Business Analysis (PMI-PBA) Handbook2

The Project Management Professional (PMP) emphasizes the importance of stakeholder management and engagement in successful project execution. When resistance is encountered, it's crucial to understand the concerns of the stakeholders and address them appropriately. This could involve revisiting the stakeholder engagement plan to ensure it effectively addresses the needs and concerns of all stakeholders. This approach aligns with the guidance provided in the Professional in Business Analysis Reference Materials, which also underscores the importance of stakeholder engagement and the need to address stakeholder concerns in a timely and effective manner. References: Project Management Professional (PMP) Certification, PMBOK Guide, Professional in Business Analysis Reference Materials. Please refer to the respective guides for more detailed information.

Perform Integrated Change Control is the process of reviewing all change requests, approving changes and managing changes to deliverables, organizational process assets, project documents, and the Project Management Plan, and communicating the decisions1. This process is important to ensure that only approved changes are implemented and that the project remains aligned with the project objectives and stakeholder expectations. In this scenario, the project manager should perform Integrated Change Control to evaluate the impact of the proposed alternative solution on the project scope, schedule, cost, quality, risk, and other aspects. The project manager should also consult with the project sponsor, customer, and other key stakeholders to obtain their approval or rejection of the change request. The project manager should document the change request and its status in the change log and update the project management plan and other relevant documents accordingly. The project manager should also communicate the change and its implications to the project team and other affected parties. By performing Integrated Change Control, the project manager can ensure that the project is managed in a controlled and consistent manner, and that the project deliverables meet the agreed requirements and expectations. References:
* How To Successfully Perform Integrated Change Control
* 6 Steps for an Integrated Change Control Project Management Strategy
* Performing Integrated Change Control: PMP Tips

The new project manager should encourage participation in decision making and empower the team to improve their motivation and engagement. This is a key aspect of managing human resources in a project, as it fosters trust, collaboration, and ownership among the team members. The project manager should also communicate the project vision, goals, and expectations clearly and regularly to align the team and provide feedback and recognition. These actions can help the project manager to build a high-performing team and enhance the project performance.
The other options are not the best choices for the new project manager. Ensuring everyone performs their assigned tasks as planned may not address the root cause of the team's lack of direction and enthusiasm. It may also imply a micromanagement style that can demoralize the team further. Organizing frequent team building sessions and updating the risk register are good practices, but they are not sufficient to improve the team's morale and commitment. They should be complemented by other actions that involve and empower the team. Meeting with the project sponsor and proposing a corrective action for the project may be necessary if the project is facing serious issues, but it does not directly address the team's situation. The project manager should first try to understand and resolve the team's concerns before escalating them to the sponsor. References:
* PMBOKGuide, 6th Edition, Chapter 9, Section 9.4, "Manage Project Team"
* PMBOKGuide, 6th Edition, Chapter 9, Section 9.4.2.3, "Interpersonal and Team Skills"
* PMP Project Management Professional Exam Study Guide: 2021 Exam Update, 10th Edition, Chapter
8, Section 8.3, "Managing Resources" 1