See the Explanation for the solution.
Explanation:
Part 1:
Change Control Process:
Consult the RACI matrix.
Define new requirements and record changes.
Assess the schedule, risk, and cost.
Perform a demonstration.
Obtain a sign off.
Update and test the deliverable.
Make an announcement on the company portal.
The change control process is a sequence of steps that helps to manage and document any changes or modifications to a project scope, schedule, cost, quality, or resources. The change control process typically involves the following steps:
Consult the RACI matrix. A RACI matrix is a tool that defines and clarifies the roles and responsibilities of each team member for each task or activity in a project. RACI stands for responsible, accountable, consulted, and informed. Consulting the RACI matrix can help to identify who needs to be involved or informed about the change request and how to communicate with them.
Define new requirements and record changes. The new requirements and changes are the details of what needs to be modified or added to the project deliverables or objectives based on the customer feedback or request. Defining and recording the new requirements and changes can help to communicate and justify the need and rationale for the change and its implications on the project scope and quality.
Assess the schedule, risk, and cost. The schedule, risk, and cost are the aspects of the project that may be affected by the change request. Assessing the schedule, risk, and cost can help to determine the impact and feasibility of the change and identify any possible alternatives or corrective actions to minimize or avoid its negative effects.
Perform a demonstration. A demonstration is a presentation or show of how the modified or updated deliverable works or meets the customer expectations or requirements. Performing a demonstration can help to validate and verify that the change request has been implemented correctly and effectively and to obtain feedback or approval from the customer or stakeholders.
Obtain a sign off. A sign off is a formal acceptance and approval of the change request and its deliverables from the customer or stakeholders. Obtaining a sign off can help to confirm that the change request has been completed successfully and satisfactorily and to close the change control process.
Update and test the deliverable. The deliverable is the product or service that is produced or provided by the project. Updating and testing the deliverable can help to ensure that it meets the quality standards and criteria and that it works as expected after implementing the change request.
Make an announcement on the company portal. The company portal is a platform or channel that allows internal communication and collaboration among employees within an organization. Making an announcement on the company portal can help to inform and update other team members or departments about the change request and its outcomes and to share any lessons learned or best practices from the change control process.
Part2:
Risk register: A risk register is a document that identifies, analyzes, and records the potential risks or uncertainties that may affect a project. Updating the risk register can help to capture any new or modified risks that may arise from the change request and to plan and implement appropriate risk responses.
Schedule: A schedule is a document that shows the planned start and end dates, durations, dependencies, and progress of each task or activity in a project. Updating the schedule can help to reflect any changes or adjustments to the project timeline or milestones that may result from the change request and to monitor and control the project performance and delivery.
Statement of work: A statement of work (SOW) is a document that defines the scope, deliverables, schedule, and terms and conditions of a project or contract. Updating the SOW can help to document any changes or additions to the project scope or deliverables that may be requested or agreed upon by the customer or stakeholders and to ensure alignment and agreement on what needs to be done and how it will be done.
Change log: A change log is a document that tracks and records any changes or modifications that are made to the project scope, schedule, cost, quality, or resources during a project. Updating the change log can help to document the change request, approval, implementation, and impact of each change and ensure traceability and transparency.

The velocity chart typically shows the amount of work completed over time. If the "Actual Effort" line is below the "Planned Timeline," it indicates that the project is not progressing as fast as planned, hence it is behind schedule. This is inferred by comparing the actual work completed against what was scheduled.
References = The answer is based on standard project management practices and the typical interpretation of velocity charts in project management. For detailed information, please refer to the CompTIA Project+ Study Guide and other official CompTIA resources.

A finish-to-start relationship is a type of logical dependency between two tasks, in which the first task must be completed before the second task can start. In this scenario, the document containing information about how the new system will interact with other systems within the organization is a prerequisite for the configuration of the system in development. Therefore, the document writing task must finish before the configuration task can start, which is a finish-to-start relationship. Reference = CompTIA Project+ Study Guide: Exam PK0-005, 3rd Edition, Chapter 6: Schedule Management1; CompTIA Project+ Certification Study Guide, 3rd Edition, Chapter 6: Schedule Management2

The critical path of the project is the longest sequence of tasks that must be completed on time for the project to finish on schedule. It determines the shortest possible duration of the project and shows the tasks that have no slack or float. Any delay in the critical path tasks will affect the project completion date. To find the critical path, we need to calculate the earliest start (ES), earliest finish (EF), latest start (LS), latest finish (LF), and slack (S) for each task. We can use the table and the network diagram given in the question to do this. The formula for calculating the slack is S = LF - EF or S = LS - ES. A task with zero slack is on the critical path.
The calculations are as follows:
Task | Duration | ES | EF | LS | LF | S A | 10 | 0 | 10 | 0 | 10 | 0 B | 15 | 10 | 25 | 10 | 25 | 0 C | 10 | 10 | 20 | 15 |
25 | 5 D | 20 | 25 | 45 | 25 | 45 | 0 E | 10 | 25 | 35 | 35 | 45 | 10 F | 15 | 20 | 35 | 30 | 45 | 10 G | 5 | 45 | 50 | 45 | 50 |
0 H | 10 | 35 | 45 | 40 | 50 | 5 I | 20 | 35 | 55 | 30 | 50 | -5 J | 5 | 50 | 55 | 50 | 55 | 0 Based on the table, we can see that the tasks with zero slack are A, B, D, G, and J. Therefore, the critical path is A-B-D-G-J, which has a total duration of 55 days. The other options are not the correct critical paths, as they either include tasks with positive slack (such as C, E, F, and H) or have a longer duration than 55 days (such as A-C-F-I-J).

In order to find the client billing rate for a particular engineer, the project manager would need to refer to the
SOW (Statement of Work). The SOW is a document that outlines the work to be performed, the timeframe for
completion, and the cost of the project. It also includes information about the resources involved in the project
and their billing rates. References: CompTIA Project+ Study Guide Section 2.2.
The project manager would need a statement of work (SOW) to find information about the client billing rate
for a particular engineer. A SOW is a document that defines the scope of work for a project or contract. It
usually includes information such as deliverables, milestones, timeline, costs, payment terms, quality
standards, and acceptance criteria. A SOW can help to specify what services or products will be provided by
whom, when, where, how, and for how much.