In the treatment of spine injuries, it is often necessary to provide some tension along the spinal column to stretch the backbone. One device for doing this is the Stryker frame. A weight W is attached to the patient and friction between the person's body and the bed prevents sliding. a. If the coefficient of static friction between a 78.5 kg patient's body and the bed is 0.75, what is the maximum traction force along the spinal column that W can provide without causing the patient to slide? b. The cable is attached to the patients head by two cables inserted into a special neck collar, shown below. What is the tension in each of the cables attached to this neck collar?