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1)Compare the muscle force that needs to create equilibrium between two cases

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1)Compare the muscle force that needs to create equilibrium between two cases. What is the ?????? ????? ?? ??? ???? ratio of the muscle force between the left and right (i.e. ?????? ????? ?? ??? ?????). (5 points) 2. Safeway hired you to assess potential low-back injury risks for a warehouse employee. The task they are concerned about is the placing of boxes full of pinot noir wine bottles on storeroom shelves. Perform the following analyses for a worker with stature 1.80m and mass of 80kg. The weight of the box is 20 kg. The posture required to perform the task is shown in the figure, and supplementary information provided in the table below. (10 points) Link Lower Arm Upper Arm L5 -Shoulder Length 0.349 m 0.335 m 0.400 m CoM location From Proximal End 0.150 m 0.146 m 0.356 m Proximal End Weight Elbow Shoulder L5 19.6 N 24.3 N 283.0 N ?1 = 60° ?2 = 30° ?3 = 5° a. Please perform multi-link static analysis to calculate the reaction forces and moments at each joint (elbow, shoulder, and L5/S1). Please summarize the results in the following table. Joint Elbow Shoulder F (N) Moment (Nm) L5/S1 b. Comparing this problem with the homework problem (#2. multi-link static analysis), please discuss potential injury risks of each tasks in terms of biomechanical measures (forces, moments, and muscle forces) at each joint.