A market is initally served by a monopoly firm 'A' with demand given by Q=400-P, and marginal costs given by MC=100. Find the monopoly price and quantitty. Now, a new firm 'B' enters the market, and takes A's initial output as given. Find A's profit maximizing price and quantity under this assumption. Have B respond to the new entrant under the same assumption that A's output is given. Repeat this process for three additional iterations.