Consider the weighted voting system [39: 23, 15, 6]. (a) Which of the following are winning coalitions? (Check all that apply.) {P1, P2, P3}{P1, P2}{P1, P3}{P2, P3}{P1} (b) Which of the following weighted voting systems is equivalent, meaning has exactly the same winning coalitions, to the above? [5: 2, 2, 1] [5: 3, 2, 2] [5: 5, 3, 1] [5: 3, 2, 1] [5: 4, 3, 2]