A user complains that the network printer is not printing.  The system administrator knows there is a print queue for the network printer and needs to check on the queue.  Which command is run?（）

To examine the Exhibit, press the Exhibit button. A user is compiling a C program.  A performance problem occurs and "vmstat 120 10" is run to determine the cause.  The vmstat output is provided in the exhibit.  Which of the following commands should be run to obtain more information about the problem?（）