problem1. It is probable to define more operations for a Graph ADT. Illustrate two operations which you think would be useful additions to WeightedGraphInterface.
problem2. Class WeightedGraph in this chapter is to be extended to comprise a removeVertex operation, which eradicates a vertex from the graph. Deleting a vertex is more complicated than deleting an edge from graph. Discuss the reasons for this operations’ greater difficulty.
problem3. Our shortestPaths method is concerned with the minimum distance between two vertices of a graph. Make a minEdges technique which returns the minimum number of edges which exist on a path between two given vertices. You can put your new technique in our useGraph class in the textbook and use it to test your code.