4:09 PM 슐 session.masteringphysics.com Item 2 MasteringPhysics 52% Item 2 Part A Approximately what magnitude force, FM,must the extensor muscle in the upper arm exert on the lower arm to hold a 5.4-kg shot put 2.5 cm 30.0 cm Elbow joint Q Tap image to zoom Assume the lower arm has a mass of 2.9 kg and its CG is 13 cnm from the elbow-joint pivot. Express your answer to two significant figures and include the appropriate units. FM= 1 Value Units