The results of the fatigue testing for a hip joint that your company has developed are depicted below. Walking normally places a load on the hip that is equal to about 2.5 times body weight. Jogging imposes a load of 5.5 times body weight. The contact surface area for the device is 6 cm. Use the fatigue testing results to answer the following questions. Show all work for full credit. Stress amplitude, S (MPa) 6 0 104 T 105 106 T 107 T T T 108 10 1010 101 Cycles to Failure, N (logarthmic scale) T 102 T 1013 T 1014 1015 a) If a person weighing 65 kg were to use this device, averaging 10,000 steps per day, what is the expected lifetime of the implant? (6 pts.) b) What is the expected lifetime of the implant if the person weighs 100 kg and averages 10,000 steps per day? (6 pts.) c) What is the expected lifetime of the implant if it is implanted in someone weighing 65 kg who jogs 10 miles a week? (Assume a stride length of 1 yard.) (6 pts.)