Which of the following is a schedule that illustrates the duration of an activity?

Which of the following Agile ceremonies is used to determine the backlog items that will be worked on the next weeks?

On an OBS chart, there is a dashed line between some team members and the project manager, and there is a solid line connecting other members to the project manager. Additionally, some employees at a lower level on the chart have no connection to the project manager.
Which of the following does this signify?

Which of the following is a definition of an RFP?

A project manager has received numerous complaints from staff concerning poor service provided by a vendor.
Which of the following steps should the project manager take FIRST to correct the problem?