For this set of projects for the course, we wish to simulate some of the aspects of a number of Sea Ports. Here are the classes and their instance variables we wish to define SeaPortProgram extends JFrame o variables used by the GUl interface o world: World Thing implement Comparable o index: int o name: String o parent: int . World extends Thing o ports: ArrayList o time: PortTime SeaPort extends Thing o docks: ArrayList Dock> que: ArrayList // the list of ships waiting to dock o ships: ArrayList //a list of all the ships at this port o persons: ArrayList //people with skills at this port Dock extends Thing . o ship: Ship Ship extends Thing o arrivalTime, dockTime: PortTime o draft, length, weight, width: double Jobs: ArrayList o index: int o name: String o parent: int . World extends Thing o ports: ArrayList o time: PortTime SeaPort extends Thing o docks: ArrayList Dock> que: ArrayList // the list of ships waiting to dock o ships: ArrayList //a list of all the ships at this port o persons: ArrayList //people with skills at this port Dock extends Thing . o ship: Ship Ship extends Thing o arrivalTime, dockTime: PortTime o draft, length, weight, width: double Jobs: ArrayList