Java data structure's question.

Can you explain or draw a picture why the answer is (E)id[i]: 9 7 7 9 3 7 6 7 5 7 ????

This question refers to the specific implementation given in the text Using WEIGHTED QUICK UNION (no path compression): What is the contents of the id] array after running quick-union on the following sequence, where 9-0 represents a call to uf.union(9,0). 9-0 3-4 5-8 7-2 2-15-7 0-3 4-2 i: 01 2 3456789 id[il: 4 22428 6 22 0 xi:0 1 2 3456789 idtil: 411418621 0 i:01 23456789 idli]: 9779396 5 5 9 i: 01 2 3456789 id[il: 9999996999 i: 0 12 3456789 idiil: 9779376757 i:01 23456789