For the rehabilitation of patients with broken legs, you are asked to design a cable-pulley arrangement that can apply a horizontal traction 7 = 90 N using a mass with weight W = 30 N. Use Figure 2 as a starting point for your sketch. a. Sketch a cable pulley system that can accomplish the task described above. Each part (pulleys, cables, supports) should be clearly illustrated in your sketch and properly connected to one another. b. Report the complete calculations to verify that the arrangement you designed achieves the desired goal. Include free-body diagrams where appropriate, and justify your reasoning using the principles of statics. ? W