#
Solve this:

6. (i) If $U=\left\{x:0\le x\le 10,x\in W\right\}$ and $A=\left\{x:xisamultipleof3\right\}$, find A'

(ii) If U is the set of natural numbers and A' is the set of all composite number, then what is A ?

A is (3,6,9), A' is (0,1,2,4,5,7,8,10)

2) U is (1,2,3,...)

A' is (4,6,8,9,10,12,14,....) ( A' is all non - prime numbers )

A is (2,3,5,7,11,13,....) ( A is all prime numbers )