Problem #WSP-5282

Problem

Consider a set of natural numbers $A$, consisting of all numbers divisible by $6$, let $B$ be the set of all natural numbers divisible by $8$, and $C$ be the set of all natural numbers divisible by $12$. Describe the sets $A\cup B$, $A\cup B\cup C$, $A\cap B\cap C$, $A-(B\cap C)$.