In each case the following scenarios, which of machines A-E is the client and which is the server?
i. In an X-windows environment, a program is running on machine A, displays windows on machine B and a window manager on machine C controls the look and feel of the windows.
ii. In the example of part i), a file is accessed on another computer on the network, machine D.
iii. To extent the example further in the process of accessing the file on another machine on the network, the operating system has to check security information stored on a disk on machine E.