​In the rapid application development (RAD) model in the accompanying figure, the _____ phase focuses on program and application development tasks similar to the SDLC.

​In a use case diagram, the user becomes a(n) _____, with a specific role that describes how he or she interacts with a system.

A _____ represents the work that one person can complete in one day.​

​The _____ is the most pessimistic outcome of a task.

​_____ means that a proposed system will be used effectively after it has been developed.

_____ refers to the practical resources needed to develop, purchase, install, or operate a system.​

​Identify is a typical example of a system requirement for the performance category.

​Projects where management has no choice in implementing them are called _____ projects.

In a systems development life cycle (SDLC) model, the purpose of the _____ is to create a physical model that will satisfy all documented requirements for the system.​

The Linux command can be used to create a new directory (also known as a sub-directory or folder) in the network’s file system. Assume: assume the command is being executed from a terminal that has Linux commands enabled and that the user has permission to write to the location of the new directory.  Include only the command name and not any additional options or the directory name.