Let A = {0,1,2,3} and R ={(x,y) | x,y E A AX= y mod 2}. Suppose that O is in the equivalence class 1. Assign other elements to equivalence classes (if there is a choice, assign a smaller element to a smaller-numbered class; you do not have to use all possible choices). 1. Class 1 3 2. Class 2 2 3. Class 3 1 4. Class 4