Derive exception classes from the class you wrote in the previous exercise. Each new class should indicate a specific kind of error. For example, InvalidHourException could be used to indicate that the value entered for hour was not an integer in the range 1 to 12.

Previous exercise. 

Write an exception class that is appropriate for indicating that a time entered by a user is not valid. The time will be in the format hour:minute followed by “am” or “pm.”