To start, you will specify the API for a Java class or classes representing a directed labeled multigraph. The API, or public interface, is the collection of public classes and methods that clients of your graph ADT will use. We recommend that you work in iterative layers of detail. Start rough $$ preferably with pencil and paper $$ by brainstorming what operations the ADT needs to support, how it might be logically broken into modules $($classes$/$interfaces$),$ and how these modules connect to each other. Then, jot down a list of methods for each class that provide these operations. Think through some possible client applications, particularly finding efficient routes between different nodes, to get an idea about what operations might be needed.