Please firstly read paper "Shareholder voting" written by Ritzberger in 2005 and then answer the question:

Suppose there are two groups with voting powers, each number of them has shares to vote: Group1={30%,30%} and Group2 ={40%};(numbers show the voting power that each member owns of that group)

Members of support Group1 for staying at home and the members of Group2support a proposal for going. If nobody shows up in the meeting, the staying home will survive. The unchanged cost of going to voting is 10. The payoff of obtaining your ideal outcome is 20 and losing won't be punished but payoff is 0.

Show that in the pure Nash equilibrium of the game Group2 wins.