New PMP Question & Answers with explanation

Which of the following estimate ranges represents a rough order of magnitude?
Select one
Grant hesitantly knocks on his project sponsor’s door to notify her of a budget overage that has occurred. Because of a vendor error, he shared that a critical piece of equipment would cost $30,000 more than originally estimated. Fortunately for Grant, the sponsor understood the situation and approved the use of funds set aside for unexpected events. From where will Grant pull the funds to cover the equipment?
Select one
Julie is a product manager responsible for a line of smart water bottles that connect to a mobile app to capture data and provide suggestions regarding your drinking habits. In preparation for the upcoming sprint, she meets with the team to ensure that stories are clear and appropriately sized. What activity is Julie performing with the team?
Select one
A project manager facilitates the voting process for decision-makers who have convened to review a major deliverable that has been completed. The intent of the meeting is to vote on whether to approve and accept the deliverable. What key input will the committee need to reference to vote?
Select one
Using the earned-value analysis technique, a project manager calculates a schedule performance index of 0.75 and a cost performance index of 1.25. To bring the schedule back on track, the project manager decides to allocate additional resources to critical activities in order to complete them faster. What technique are they using to control the schedule?
Select one