Exercise: Let R be a relation on people such that (a,b) is" a is a parent of b Let S be a relation on people such that (a,b) is "a is a sibling of b" What is SOR, ROS, ROR? SoR composes R with S (a,c) is in SoR if there exists (a,b) in R and a(b, c) in S "a is parent of b" and "b is sibling of c " SoR should be in R! RoS composes S with R "a is sibling of b" and "b is a parent of c" therefore (a,c) is "a is an aunt/uncle of c " I DIDNT UNDERSTAND THAT WHERE C CAME FROM PLEASE EXPLAIN DETAILED

5) What is the cardinality of the set {characters in set A}? 6) Let X = {strings in A}. Find |X 7) Let X {strings in A} Name two B, CC X and two D, ECX such that... a) BUC X B = C = b) DNE #Ø E = 8) Suppose we define a relation on the set {strings in A} by making 69°F a

Explain whny the following binary relation on. 1,2,3} Is not R= {(1,1)(1,2),(1,3),(2,1).(2,2).(3,3)}|

DISCRETE MATHEMATICS​​​​​​​

Let S = {a, b, c}. Then R = {(a, b)} is a relation on S. Which of the properties reflexive, symmetric andtransitive does the relation R possess? I know that its not reflexive or symmetric but its vacuously transitive, but I dont get why, so please explain step by step