8. Dr. Ben Carson, the former Housing secretary, while talking about his teenage years during his presidential campaign time, stated that when he was young he tried to stab someone with a camping knife and the knife broke when it hit the metal buckle of the victim's belt (Watch this: https://www.youtube.com/watch?v=dm3mt275RVY). Assuming that the camping knife was made of medium carbon steel, discuss the metallurgical reasons why the khife broke on impact. Note: The metallurgical conditions of a knife is different from that of ship hull plate