Create a class called ExceptionPractice which includes a main method. The program asks user to enter a string. If the first character of the string is not a letter, it throws an InvalidStringException. The program handles the exception by printing an error message and exiting the program. Otherwise, it converts the first character into Uppercase $($without changing the rest of the characters$)$ and print the new string. You also need to write a class for InvalideStringException. It should extend the Exception class. You need to include two constructors, the default constructor and a one$-$parameter constructor $($for which the parameter type is String$).$ Include the code for both ExceptionPractice class and InvalidStringException class below.