A cellular layout contains various machines in close proximity to one another. What kind of health and safety issues can arise in a cell? Give an example. Hint: see e.g., G. D. Brown and D. O "Rourke, “Lean Manufacturing Comes to China: A Case Study of its Impact on Workplace Health and Safety ” International Journal of Occupational and Environmental Healthy 13(3), Juiy/September 2007, pp. 249-257.