A computer technician arrives at work at 8AM and finds a department manager delivering three malfunctioning laptop computers. The computer technician begins to repair the problems as soon as possible. The technician begins on the first computer and does not start the second computer until the first is repaired. The technician works on only one computer at a time.
The first computer is repaired by 11am
The second computer is repaired by 1pm
The thirds computer is repaired by 4pm
What is the total process velocity?