Which of the following statement is true about graphObj?

1. The variable graphObj has no methods, and only has access to the nodes and edges arrays.

2. The variable graphObj can perform both the addNodes and addEdges methods.

3. The variable graphObj can only perform the addEdges method.

4. The variable graphObj can only perform the addEdges method.

Consider the following JavaScript code for creating a Graph object: function Graph() \{ this.nodes =; this. edges =; \} Graph.prototype.addNodes = function (n){ this. nodes.push(n); \}; Graph.prototype.addEdges = function(n)\{ this. edges.push(n); \}; let graph0bj = new Graph()