Assume you are given a class called Publisher that has two attributes publisherID and name of type String. There is another class called Book that has three attributes title of type String, authorName of type String and p of type Publisher, the constructor of class Book can be written as: public Book (String t, String an, Publisher pub) { title = t; authorName=an; p.publisherID = pub. publisherlD; p.name = pub.name; public Book(String PID, String n) {title = "Unknown", authorName = "Unknown"; publisherD=plD; name = n; public Book(String t. String an, String p1, String n) { title=t; authorName=an; p = new Publisher(p1, n): } public Book (String t, String an) {title=t; authorName=an; publisherID = "Unknown"; name = "Unassigned"; }