3. Let ~ be defined on R by zy if and only if z-y Z. The relation is an equivalence relation. Describe the equivalence class of each element listed below. Your description should be a set; for each one, provide a bunch (around 6-10) of elements in the set and then use... to indicate that a pattern will continue from there. This means that you need to provide enough elements to make the pattern clear! (a) 5 (b) (c) -2.7