How to create a payoff matrix, and example of a 3x3

The table below is the payoff matrix for a simple two-firm game. Firms A and B are bidding on a government contract, and each firm's bid is not known by the other firm. Each firm can bid either 10000 or 5000. The cost of completing the project for each firm is 4000. The lowbid firm will win the contract at its stated price; the highbid firm will get nothing. If the rwo bids are equal, the two firms will split the price and costs evenly. The payoffs for each firm under each situation are shown

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