For each relation, decide whether or not it is a function. Relation 1 Relation 2 Domain Range Domain Range sun 0 6 paper -9 0 - 8 leaf -2 desk - 8 star -9 O Function O Not a function O Function O Not a function Relation 3 Relation 4 ((u, u), (k, u), (v, k), (j, k) } 1 (3, x), (-4, x), (2, x), (6, x) ) O Function O Function O Not a function O Not a function X 5