Companies A and B are considering developing a new online platform. Suppose that A is ahead in the development process and that B is considering whether to enter the competition. If B stays out, it earns zero profit and A, being the monopolist earns a profit of RM1 billion. If B decides to enter and develop the rival platform, then A has to decide whether to accommodate B peacefully or fight in a price war. In the event of peaceful accomodation, each firm will make a profit of RM300 million. If there is a price war, each will lose-RM100 million.

1. i)Draw the extensive form (game tree) for this game.
2. ii)Find the subgame perfect Nash equilibrium.
3. iii)Write the normal form of the game.