Equivalence classes form induced relation

Question

I am completely stuck on a question that is as follows

Let B = {0,1,2,3,4} and let {0},{1,3,4},{2} be a partition of B             
that induces a relation Q.
Find the distinct equivalence classes of Q

I do not even know where to start with this question and any help is greatly appreciated. Thank You

Answer 1

If P is a partition of a set S, then the relation R defined by xRy iff there exists A in P with x,y in A is, an equivalence relation for which P is the equivalent classes.