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Use the Command pattern to implement string editing with undo/redo.

(1) Use an abstract Command base class.

(2) Implement and demonstrate command to append a letter to a string

(3) Implement and demonstrate command to delete a letter from the start of a string

(4) Implement and demonstrate command to delete a letter from the end of a string

(5) Implement and demonstrate command to capitalize a letter at any index within a string

(6) Implement and demonstrate command to lower case a letter at any index within a string

(7) Implement and demonstrate command to make a whole string use title case

(8) Implement an undo stack and demonstrate that all commands performed may be undone

(9) Implement an redo stack and demonstrate that all commands undone may be redone

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I am attaching the code in which the menuItem class is given.. I need those 9 things to be done ..

Skills: C++ Programming, Java, Python

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