Q1- Let U = set of positive integers less or equal to 30, and A,
B be the subsets of U where
A = positive odd integers less than 20,
B = Positive integers divisible by 3.
Find A
B and A
Bc.
Q2- Let A = {1,2,3,4,5}, B ={ 6,7,8} define relations R and S as
follows
R ={ for all (x,y) 
A*B, xRy iff y – x > 4}.
S ={ for all (x,y) A*B, xSy iff y / x} .
Find RS and RcSc.