Hello, in Java please. (My IDE is Eclipse)

Problem 1:

1) Define the class Publication that contains

The private properties title of type String, year of type int, authors of type String, and

publisher of type String

An empty no-arg constructor

A constructor that takes four parameters and sets the instance variables accordingly

A getter and setter methods for each instance variable

The instance method toString that does not take any parameter and returns a string. The

returned string is a string representation of the four instance variables. The format is of

your choice.

.

2) Define the class Conference that extends the class Publication and contains

The private properties name of type String, pages of type String, location of type String, and fee of type double.

An empty no-arg constructor

A constructor that takes four parameters and sets the instance variables of the class

Conference accordingly

A constructor that takes eight parameters and sets the instance variables of the class

Conference and the class Publication accordingly. You may use the setter methods to set the

values of the private instance variables of the class Publication.

A setter and getter methods for each instance variable

The instance method toString that does not take any parameter and returns a string. The

returned string is a string representation of the eight instance variables (four defined in

Conference and four defined in Publication). The format is of your choice.

.

Problem 2: A String contains the information of students in the following format.

String dataBase = FirstName1 LastName1 birthYear1 id1 gpa1,FirstName2 LastName2 birthYear2 id2

gpa2,

birthYear and id are stored as integer values and gpa as a double value.

.

A. Write a method named averageAge that takes a string in the above format and returns the

average age of the students. The methods header is as follows:

public static double averageAge(String s) { }

.

B. Write a method named averageGPA that takes a string in the above format and returns the

average age of all the students. The methods header is as follows:

public static double averageGPA(String s) { }

.

C. Write a method named studentInfo that takes two arguments: A string in

the above format and an integer value. The information of the student whose ID is provided as

the second argument is displayed. The header of the method is as follows:

public static void employeeInfo(String s, int id) { }

The method displays Record unfound if the second argument does not match any students ID