7. 60 people attend a game night. Everyone chooses to play chess, a two-player game, or cribbage, a four-player game. All 60 people are playing either chess or cribbage.
a. Complete this table showing some possible combinations of the number of each
type of game being played

b. There are 3 more games of cribbage being played than games of chess being played.
How many of each game are being played? Explain or show your reasoning.