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A vehicle class Traffic is defined, which contains attributes: the number of wheels, the speed of travel, and the method of driving, including the parametric and parametric construction methods. Please define auto Car (with the construction method of ginseng contains fuel properties), Train (train class construction method of no arguments), class Plane (including aircraft attributes, the maximum range contains no parameters and construction method of ginseng), let them inherit the Traffic method, and override driving. In the test class, three objects of the subclass are created, and the driving method is called. (