When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in Figure P12.50a. The gravitational force on the body Fg is supported by the force n exerted by the floor on the toe. A mechanical model for the situation is shown in Figure P12.50b, where
T is the force exerted by the Achilles tendon on the foot and R is the force exerted by the tibia on the foot. Find the values of T, R and θ and when Fg = 700 N.