In the machine-repair model of Exercise 3-14, suppose it costs $80 in lost productivity for each hour that each machine is broken down and $19/hour to employ each repair technician (the technicians are paid this hourly wage regardless of whether they are busy or idle). Modify the model to collect these cost data, and report the average total cost per hour. Also, show the machines in the “up” state in a separate area of the animation, make separate animation pictures for up vs. down machines, and keep track of the number of machines up (and plot it). Make the number of machines in the shop a Variable. If you want to minimize total average cost, is two the right number of repair technicians? Experiment (though see Exercise