Question: Question 3 [20 marks]: We have a class called electronic device that shows the information of an electronic device with two attributes: serial_number and year_built.
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Question 3 [20 marks]: We have a class called electronic device that shows the information of an electronic device with two attributes: serial_number and year_built. The classes phone and laptop are inherited from electronic device. We have another class called smartphone that inherits from phone class. The code is provided bellow: #include
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