Exercise 4: User Create class User that has the following instance variables; User is a generic class representing the people. This class should obey the following specification: It should be placed in the eg.fue.cs.users package. It contains the following attributes: name, age, address, Job. It contains the following attribute inbox which is a list of Messages ( Try to use ArrayList) It contains the following attribute sent which is a list of Messages (Try to use ArrayList) It should have two constructors. It should contains a method void change Job(Job job), that change the current job of the user It should contains a method void recieve Msg(Message msg), that will added to his inbox It should contains a method boolean sendMsg(User u, Message msg), that will send msg to the user u It should contains a method boolean delete Msg(Message msg), that will delete the msg from the inbox list