This climber (mass=52kg) is maintaining this posture while grabbing onto a rock at P3 and reaching for the wall with her right hand (no contact of wall and right hand). The rock at P1 applies a force of 187.4 N at an angle of 140.2 deg from the positive x axis on her right foot at P1. The rock at P2 and the climber's pants have a coefficient of static friction of 0.78 and the y component of the force of the rock on her pants is 144.0 N upward. The rocks at P1 and P2 are vertical surfaces. The friction forces acting at P1 and P2 are as large as friction will allow. Analyze the forces in the frontal plane as shown and show mechanical rationale for each question. 1. What is the net interaction of her left hand on the rock at P3? (Note that you need to specify if your answer is expressed as hand on rock OR rock on hand) 2. Which surface (P1 or P2) has a lower coefcient of static friction? 3. Which muscles/ligaments need to be activated or be under tension at her right knee: knee exors/knee extensors/LCL/MCL? The picture shows the back portion of her leg. NOTE: assume that Fg on the leg is negligible in comparison to F1 4. For this part, set the coefcient of friction to 0.5 at both the knee/wall interaction(P2) and the foot/wall interactioanl). With these coefficient values, could she maintain static equilibrium if she let go with her left hand so that her only remaining contacts with the wall are at P1 and P2?