Sampson, Rameck, and George pushed each other to do better.
Explanation: Sampson, Rameck, and George could exhibit positive peer pressure as they had each other's support.
As the three kids came from an underprivileged background, they did not have proper resources to accomplish their goals. Also, their neighborhood was violent, which did not gave them positive vibes or any encouragement. However, this did not deter them from their goal of becoming successful doctors in the future. They made a pact that they will overcome all obstacles and support each other in their endeavors.