in python, thanks. I'd really appreciate if you could explain

Construct a routable road network based on NetworkX a) Each edge should at least contain "type"/"highway" and "length" i. Method 1: OSMnx ii. Method 2: From scratch (w/o using OSMnx): An optional choice, you would be awarded with bonus score if you choose such a method. b) Test whether the shortest path query can work correctly given arbitrarily two vertices in the road network (show the testing process in your report). - It should be already functional if you use Method 1 to construct the road network. Otherwise, you should pay additional attention to it. - The shortest path query is NOT required to be implemented by your own. You can use the interface of NetworkX, e.g., nx.shortest_path, nx.astar_path Visualize your network data with at least 3 figures using arbitrary visualization tools. For example, you can plot the road network in QGIS, draw the distribution of the road type/highway, the distribution of the road length