Develop a class diagram for a Message class for a cell phone company. Include generalizations for child classes TextMessage, VideoMessage, and VoiceMessage.

The Message class has attributes of account number and price. In addition it has the methods getInfo(accountNum) and calcPrice().

The subclasses each have one additional attribute of thier own. TextMessage has characterLength, VideoMessage has messSize and VoiceMessage has numMinutes.

Each subclass overrides the methods of the superclass with thier own. No getter or setter methods need to be documented.

Use UMLet to draw the diagram, then copy and paste (or export an image and import) to a word processing document. Don't forget your name and other requried info at the top of the page.