he girl is performing a wall sit. The mass of her left lower leg and foot (CM shown) is 11.00 kg. The floor exerts a force F2 on her left foot at P2 of 76.9 N at an angle of 73.3 deg from the x-axis. The quadriceps muscles pull on the patellar tendon at P1 with an .ngle of 40.0 deg above the positive x-axis. All other muscles crossing the knee are relaxed. Please note that when drawing the FBD of the lower leg, you need to have all external forces acting on the lower leg including the unknown (x and y) forces of the femur on the tibia at P3. .) Find the magnitude of the force |F1| of the quadriceps on the patellar tendon at P1 b) Find the force of the femur on the tibia at the knee joint center (P3). c} Could the girl hold this posture if the force of the floor on her feet had a negative in: component. Draw a FBD of the girl's entire body and use the sum of horizontal forces' equation to determine if she could stay in static equilibrium