A and B were high school classmates. During their moming recess, A made an agreement written in a intermediate paper that he will bring B to South Korea unree years after he will graduate from college. It was witnessed by three of their classmates and their subject teacher. It was then passed to the said subject teacher as it is one of their assignments. Four years after A graduated in Cabalum Western College, B went to him and demand that he must fulfill his promise to take him to South Korea. Is B right in enforcing his demand? Why or why not? (5