A 84.8-kg person stands on their toes by exerting an upward force through the Achilles tendon, as in the figure shown below. Calculate the force at the pivot, F),, of the simplified lever system shownthat force is representatlve of forces in the ankle joint. [Assume that the lower leg and foot are oriented such that both the force of the Achilles tendon (FA) and the normal force (N equal in magnitude to the person's weight) act perpendicular to the horizontal lever arm that represents the foot.] Image size: s m L Max