You have been asked to choose a team of 3 students for a case competition which consists of both a written analysis and an oral presentation. A list of available students, their major and speaking and writing skill scores (out of 5, with 5 being the highest) are given below. Number Name Major Speaking Writing 1 Haaland Finance 5 3 2 Mbappe Finance 3 5 3 Bellingham Operations 4 4 4 Kane Marketing 2 4 5 Ronaldo Operations 4 3 6 Messi Operations 5 2 7 Salah Marketing 3 4 Let Xi = 1 if student number i is chosen for the team, 0 otherwise, for all i = 1, ..., 7. There must be exactly one student per major (Operations, Finance, Marketing) assigned to the team