<p><img alt="6. Define a relation ~ in Z by zy if x -y is even. Please check whether is an equivalence relation" src="https://media.cheggcdn.com/media%2F2e6%2F2e64cc70-0aae-415f-8902-add30c73f108%2FphpuUDpdO.png" style="height:78px;width:1024px;" aria-describedby="d3f"/></p>6. Define a relation ~ in