XYZ Company produces 3D printed custom parts for different purposes. The company has a production line that consists of three printers with average printing times of 15, 12, and 14 minutes, for printers 1, 2, and 3, respectively. However, printer 2 is subject to random failures, which cause its fraction of uptime (availability) to be only 75 percent.

1. Which station is bottleneck of the line?

2. If availability of station 2 is reduced to 50 percent, what happens to the critical WIP W0?

3. If the availability of station 2 is increased to 95%, what happens to the critical WIP W0? Explain