Electronic document and record management systems would be the best software solutions to help an institution manage the internal flow for formally responding in writing to citizens' complaints. Electronic document and record management systems are software systems that help organizations create, store, organize, manage, track, and distribute electronic documents and records. Electronic document and record management systems can help to improve efficiency, productivity, collaboration, compliance, and security of document and record management processes and workflows3

Explanation
Presentation, application, and data processing. Presentation, application, and data processing are the three logical and physical computing tiers that make up a three-tier architecture. A three-tier architecture is a type of software architecture that separates an application into three layers or tiers that run on different servers or machines. Each tier performs a specific function or role and communicates with other tiers through well-defined interfaces. The presentation tier is the user interface and communication layer of the application, where the end user interacts with the application. The application tier is the logic or middle tier of the application, where data is processed using business rules. The data processing tier is the data or back-end tier of the application, where data is stored and managed12

A project manager who makes a company-wide announcement about the successful completion of a project
and thanks team members is doing the following:
Celebrating the team's hard work: This is the correct answer, as the project manager is acknowledging the
efforts and contributions of the team members and showing appreciation and recognition for their
performance12.
Bringing attention to the project sponsor: This is not the correct answer, as the project manager is not
highlighting the role or involvement of the project sponsor, who is the person who provides the resources and
authority for the project.
Sharing lessons learned: This is not the correct answer, as the project manager is not discussing the successes,
challenges, or best practices of the project, which are part of the lessons learned process.
Collecting feedback: This is not the correct answer, as the project manager is not soliciting any input or
opinions from the team members or other stakeholders, which are part of the feedback process.

The critical path is the sequence of tasks that determines the minimum project duration. It is the longest path through the network diagram and has the least amount of slack or float. Based on the provided network diagram, the critical path is A-C-G-K-M, which has the longest total duration when adding up the individual task durations. Reference = The concept of the critical path is covered in the CompTIA Project+ Certification Study Guide1. For more detailed information on how to calculate and identify the critical path in project management, you can refer to the study guide and other project management resources2.

The project manager should review the requested change first to assess its impact, feasibility, and alignment with the project objectives and scope. Reviewing the change will help the project manager to determine if the change is necessary, beneficial, and acceptable to the stakeholders. The project manager should also consider the risks, costs, and quality implications of the change before proceeding to the next steps of the change management process123. References = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter
9: Project Change Management, p. 323; 5 Steps in the Change Management Process | HBS Online; 8 Steps for an Effective Change Management Process - Smartsheet