4. Suppose that ABC Builders and XYZ Builders are bidding on a contract for an ofce expansion. The estimated costs of the work are $200,000 for ABC and $220,000 for XYZ. Each company wants to make some prot. Assume that the possible bids are $225,000 and $260,000. The lowest bidder will get the contract; in case of a tie, each company has a 50% chance of winning. a) Find all equilibria. b) Is there a solution to this game? In your answer, consider separately the case where the companies can communicate and cooperate (by forming a binding agreement) and the case where they can't cooperate