1. Add a method to the class OurMath, as given, that performs integer division and throws a DivisionByZeroException, as described. 2. Add statements to the driver given to test the method you defined...

1. Add a method to the class OurMath, as given, that performs integer division and throws a DivisionByZeroException, as described.

2. Add statements to the driver given to test the method you defined for the previous exercise.

3. Design and create a class UserData whose methods provide a client with valid integers and valid real numbers. Use Scanner to read input data from a user. Handle the possible exceptions to guarantee the validity of the data, have the user replace any invalid data, and finally return the validated data to the client.