The total number of representatives in a parliament is 550. In this parliament, three political parties A, B, and C have 250, 120, and 180 representatives respectively. Suppose that decisions are made by a simple majority. In other words, to approve a decision, more than half of the 550 votes are needed. In a way that determines whether the decision will be approved or not, a) Formulate this game in coalitional form, write its characteristic function. b) Determine the core