Upon examining the full assembly, we observed that the stress gradient across all the parts was within acceptable limits. There were no red spots in the model, indicating that the assembly was designed to effectively distribute the forces so that no single part would bear the brunt of the stress. 

When isolating the pedal arm, we observed that the most probable point of failure would be the top section, located to the right of the connection to the pedal rod. Despite the likelihood of failure at this point, the maximum force applied is only half of the yield strength of the part. This implies that the part has a safety factor of 2, indicating that it can withstand twice the force exerted on it before experiencing permanent deformation or failure. 

The pedal rod, on the other hand, is most likely to fail to the left of the bearing. However, despite this, the pedal rod is even stronger than the pedal arm, with a safety factor of 5. This indicates that the pedal rod can withstand up to 5 times the maximum force of a human leg before experiencing any permanent damage or failure.

The pedal pad, which receives the maximum force, has a point of failure at its connection point. Similar to the pedal arm, it also has a safety factor of 2, meaning that it can withstand twice the force exerted by a human leg.