For the graph signal shown in Figure 9.4, compute the gradient vectors at each node. What is the total variation of the graph signal?

When you copy a file from one location to another and there is already a file with the same name in that folder, you get which of the following choices in a dialog box?

A) Copy and Replace B) create new folder and then copy C) make two copies with the same name in the same folder D) move original file to another folder

Which of the following tools would be used to determine if the connection is punched down and there is noise coming across the cable?

A. Multimeter B. Cable tester C. Voltage event recorder D. Protocol analyzer