1. (10 pts) Create a class named AccountSavings. This class has a static double variable which stores the annual interest rate for all account holders. The name of variable is annualInterestRate. The class also has another double variable named savingsBalance which stores balance for current account.

a. Write a constructor to create an account with specified balance. Add a validation whether the balance is greater than 0.0 or not. If it is less than 0.0 then throw illegal argument exception.

b. Write a non-static calculateMonthlyInterest method to calculate the monthly interest by multiplying the savingsBalance by annualInterestRate divided by 12 - the interest should be added to savingsBalance.

c. Write a static method named modifyInterestRate to set the annual interest rate. Add a validation whether the rate is greater than equal to 0.0 and less than or equal 1.0. Otherwise, throw illegal argument exception.

d. Write a toString method which returns savingsBalance in a string format.

After that, create AccountSavingsTest class. Create two objects from the class AccountSavings with balances $2000.00 and $3000.00. Then, set the interest rate to 4%, then calculate the monthly interest rate for each 12 months for each object and print the new balances with toString method for each object. UPLOAD AccountSavings.java AND AccountSavingsTest.java.

Example Output: (you can create a similar output)

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2. (10 pts) Create a class Person which is a super class. The class includes four private String instance variables: first name, last name, social security number, and state. Write a constructor and get methods for each instance variable. Also, add a toString method to print the details of the person. After that create a class Teacher which extends the class, Person. Add a private instance variable to store number of courses. Write a constructor and a get method for the number of courses and override toString method for Teacher. Then, create PersonTest class and create an object from the class Teacher and an object from the class Person. Display the details of Teacher and Person (use toString methods). UPLOAD Person.java AND Teacher.java AND PersonTest.java.

Example Output: