Explanation
The project manager should contact the project management office (PMO) for assistance after learning that a similarly time-consuming project was executed previously in the organization. A PMO is a department or group within an organization that provides centralized guidance, governance, standards, best practices, resources, and oversight for project managementactivities. A PMO can help the project manager by providing access to historical data, lessons learned, templates, tools, methodologies, and expertise from previous projects that can be useful for planning and executing the current project.

The project sponsor is the person who provides the authority, funding, and support for the project. The project sponsor can also help to influence and engage the key stakeholders who are essential for the success of the project. If several stakeholders have declined the invitation for the kickoff meeting, which is an important event to establish the vision, scope, and expectations of the project, the project manager should escalate this issue to the project sponsor and seek their assistance to ensure the participation of the stakeholders1, p. 47

The project manager should exploit the risk after an opportunity emerged in the middle of a project life cycle.
Exploit is a risk response strategy that aims to increase the probability and/or impact of a positive risk or opportunity. Exploit can involve actions such as allocating more resources, changing the scope or schedule, or adding more features or benefits to the project deliverables. Exploit can help to ensure that the opportunity is realized and that the project gains more value or advantage from it3

The output of this exercise where the project manager is comparing the cost of the project to the cost savings
the project will produce when it is complete will produce the return on investment (ROI). ROI is a financial
metric that measures the profitability or efficiency of an investment by comparing its benefits or returns to its
costs. ROI can help to evaluate the value or worth of a project and support decision making and prioritization.
ROI is calculated by dividing the net benefits (benefits minus costs) by the total costs and multiplying by 100
to get a percentage.

If a project manager continues to receive project-related work after the project has been released into
production, it suggests that the project closure phase was not completed properly. The project closure phase
involves several activities, including ensuring that all project deliverables are accepted, documenting the
lessons learned, releasing project resources, and formally closing the project. If these activities are not
completed, the project can remain 'open' in a sense, leading to continued work and inquiries.
References = The answer is based on standard project management practices and the importance of the project
closure phase as described in project management literature. For detailed information, please refer to the
CompTIA Project+ Study Guide and other official CompTIA resources. Specific references to the closure
phase can be found in the CompTIA Project+ PK0-005 Cert Guide1 and the CompTIA Project+ Certification
Exam Objectives2.