Suppose a graph is created in the following code. What is the number of vertices in the graph? Integer$[]$ vertices $=\{0,1,2,3,4\}$; int$[][]$ edges $=\{\{0,1\},\{0,2\},\{1,0\},\{1,2\},\{1,3\},\{1,4\},\{2,0\},\{2,1\},\{2,3\},\{3,1\},\{3,2\},\{3,4\},\{4,1\},\{4,3\}\}$; Graph graph$1=$ new UnweightedGraph$<>($vertices$,$ edges$)$; System.out.println$("$The number of vertices in graph$1$: $"+$ graph$1.$getSize$())$; Group of answer choices $34521$