MATHS- The minimal winning coaliations of a monotone

a)The minimal winning coaliations of a monotone yes-no voting game W with five players A, B, C, D and E are,

{B,C}, {A,B,D} and {c,D,E}

1. List all of the winning coaliations of W.

2. Is W: (I) proper? (II) strong? Briefly justify the answers

3. Find the Banzhaf index of each of the players in this game.

b) Find the Shapley-Shubik index of the player with 3 votes in a {7;4,4,3,1,1,1,1] weighted voting game