On his first day of school, Jose Diaz arrived at 6:30 AM to copy handouts to give to his classes. Upon entering the copy room he found that there was already a line at the school’s one copier. He was not able to begin copying his papers until 7:45 AM, 15 minutes before classes began. After running off a few copies the machine abruptly stopped after someone turned on a microwave that is on the same electric line. It took 15 minutes to fix the electrical problem and Diaz was only able to make enough copies for his first two classes.