1 or 2 ways I can try to figure out and see what is causing your computer to do this. 1 when was the last time you shut off OR was doing on the computer? If your problem gets fixed make sure you close all running apps so the apps don't update while your computer is shutdown. 2 did you or something unplug the cables? Or maybe a virus caused something. Try to unplug every cable and wait about 5-10 minutes and if your computer is still not working, I would advise contacting an administrator.
Hope this helped.
Answer:
The answer is design.
Explanation:
I know this because based off the notes it states that "the designer can use a model or mock-up to illustrate the look and feel, to help gain a better understanding of the necessary elements and structures.
