R2  {2, 3, 4, 5, 6, 7, 8, 9, 10} , such that R2 = {(x, y) | x divides y} R4  N , such that R4 = {(x, y) | x  y  N} For each of these relationships answer: (a) Is the relationship total? (b) Does the relationship have minimal elements? If so, who are they? (c) Does the relationship have maximal elements? If so, who are they? (d) Does the relationship have a minimal element? If so, who is he? (e) Does the relationship have a maximum element? If so, who is he?