Assess the impact of the request and create a change request. The project manager should assess the impact of the request and create a change request in response to the stakeholder asking to add mobile device functionality to a project that is on track to be completed under budget and ahead of schedule. A change request is a document that formally proposes and records a modification or addition to some aspect of a project, such as scope, schedule, cost, quality, or resources. A change request can help to communicate and justify the need and rationale for the change and its implications on the project objectives and deliverables. A change request also helps to initiate the change control process, which involves reviewing, approving, implementing, and monitoring the change12

When implementing an IT infrastructure change that takes risks into consideration, the project manager should develop a rollback plan. A rollback plan is a contingency plan that outlines the steps that need to be taken in case the change does not work as expected. It includes a plan to roll back the changes and restore the system to its previous state. References: CompTIA Project+ Study Guide Section 3.3.
The project manager should develop a rollback plan when implementing an IT infrastructure change that takes risks into consideration. A rollback plan is a contingency plan that describes how to revert back to the previous state of the system in case of a failure or disruption during the change implementation. A rollback plan can help to minimize the impact of the change on the system performance and availability and ensure business continuity and data integrity.

Customer notification should be added to the issue log after receiving an escalation from an executive about the extension of the downtime after the scheduled window. Customer notification is a communication activity that informs the customers about any issues or changes that may affect their satisfaction or expectations. Customer notification can help to maintain trust, transparency, and goodwill with the customers and prevent any negative impacts on their business operations or experience.

Cultural differences are the most important aspect for the project manager to consider when assigned to a multinational project with team members from different continents. Cultural differences refer to the variations in beliefs, values, norms, behaviors, customs, and communication styles among people from different countries or regions. Cultural differences can affect how team members interact, communicate, collaborate, negotiate, make decisions, solve problems, manage conflicts, and perform tasks. The project manager should be aware of and respect the cultural differences among team members and foster a positive and inclusive team culture that leverages diversity and promotes trust and cooperation.

Explanation
A task board is a visual tool that displays team progress for stand-up meetings. A task board usually consists of columns that represent different stages or statuses of tasks, such as to do, in progress, done, or blocked.
Each task is represented by a card or sticky note that can be moved across the columns as the task progresses.
A task board can help to facilitate communication, collaboration, and transparency among team members and stakeholders. It can also help to track and manage work flow, prioritize tasks, identify bottlenecks, and resolve issues3