3. Four friends are having a competition. In each round of the competition two of the friends play a game against each other. In each game a total of 25 points are scored between the
two players. The player with the higher score is the winner of that game. Each friend will play
this game a total of three times, once against each of the others.
The table below summarizes the results in the competition so far, after each of the friends has
played two games.