I need help on this homework problem.. can someone help me out?

----SupposeA={x: x is an integer and 1 ≤ x ≤ 9}. SupposeGis a graph withV(G) = A x A, the Cartesian product of A with itself. What isV= lV(G)l?Two vertices in G, (u,v) and (a,b) are adjacent if either: u=a, v=b, or ⌈u/3⌉=⌈a/3⌉ and ⌈b/3⌉....List all of the vertices in G that are adjacent to the vertex (1,1). Recall that a graph is said to beof degreeregularif every vertex in the graph has degree r. Show that every vertex in G has the same degree. What is this degree of regularity? what isrE= lE(G)l?

---- Thank you