Four, two-person tennis teams played tennis matches. ivan collected the number of points won by both players on each team and

arranged the information into matrices as shown.

team 4

player a: a-

team 1

38

team 2 team 3

42 21

team 1 team 2 team 3 team

player b: b- 22

42 40

consider the total number of points played by each tennis team. how many teams won 60 points or less?