2.19. Let R and S be relations on set A whose digraphs are given below. Determine R, ROS, RUS and S−1. 3 S

Does the relation is a brother of have a reflexive property consider one male? A symmetric property consider two males? A transitive property consider three males?

Determine whether the set S={1,x2,2+x2} spans P2.

Does the relation is in love with have a reflexive property consider one person? a symmetric property consider two people? a transitive property consider three people?