The domain and range of some relations are given. Each relation consists of five points. Is the relation given a function? Justify your answer. a) Domain: {1, 2, 3, 4, 5} Range: {4} b) Domain: {-3,-1, 1, 3, 5} Range: {0,9} c) Domain: {2,3,6} Range: -4,6,7, 11, 15} d) Domain: {-2} Range: (9, 10, 11, 12, 13}