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28. Add the following methods to the ArrayBoundedStack class, and create a test driver for each to show that they work correctly. In order to practice your array related cod- ing skills, code each of these methods by accessing the internal variables of the Ar- rayBoundedStack, not by calling the previously defined public methods of the class. a. String toString()-creates and returns a string that correctly represents the current stack. Such a method could prove useful for testing and debugging the class and for testing and debugging applications that use the class. Assume each stacked element already provided its own reasonable toString method. b. int size()-returns a count of how many items are currently on the stack. Do not add any instance variables to the ArrayBoundedStack class in order to implement this method. void popSome (int count)-removes the top count elements from the stack; throws StackUnderflowException if there are less than count ele- ments on the stack. d. boolean swapStart()-if there are less than two elements on the stack re- turns false; otherwise it reverses the order of the top two elements on the stack and returns true. T poptop ( )the "classic" pop operation, if the stack is empty it throws StackUnderflowException; otherwise it both removes and returns the top element of the stack. 28. Add the following methods to the ArrayBoundedStack class, and create a test driver for each to show that they work correctly. In order to practice your array related cod- ing skills, code each of these methods by accessing the internal variables of the Ar- rayBoundedStack, not by calling the previously defined public methods of the class. a. String toString()-creates and returns a string that correctly represents the current stack. Such a method could prove useful for testing and debugging the class and for testing and debugging applications that use the class. Assume each stacked element already provided its own reasonable toString method. b. int size()-returns a count of how many items are currently on the stack. Do not add any instance variables to the ArrayBoundedStack class in order to implement this method. void popSome (int count)-removes the top count elements from the stack; throws StackUnderflowException if there are less than count ele- ments on the stack. d. boolean swapStart()-if there are less than two elements on the stack re- turns false; otherwise it reverses the order of the top two elements on the stack and returns true. T poptop ( )the "classic" pop operation, if the stack is empty it throws StackUnderflowException; otherwise it both removes and returns the top element of the stack