In Exercise 3-11, after (f nally) passing inspection, paint on the parts needs to be touched up, so they are sent to one of three separate touch-up-paint booths, one for each color, with each part being directed to the booth for its color (of course); each touch-up booth has its own FIFO queue and its own (single) server. Touch-up times are TRIA(3, 10, 18) minutes, regardless of color. Add a plot that tracks, on a single set of axes, the queue lengths of each of the touch-up booths (with appropriate colors for each of the three curves). In a Text box in your model, collect the same output statistics as for Exercise 3-9, in addition to the average time in queue, number in queue, and utilization for each touch-up booth. (HINT: Explore the Decide module some more, this time with “Type” chosen to be “N-way by Condition” and then “Add” conditions based on Entity Type.)