3.已知车辆（Vehicle）包括机动车（MotoVehicle）和非机动车（NonMotorVehicle）2种。小汽车（Car）、公交车（Bus）等属于机动车，自行车（Bicycle）等属于非机动车。随着能源技术的发展，出现了电动自行车（ElectricBicycle）、电动小汽车（ElectricCar）、天然气公交车（NaturalGasBus）等新型车辆。车辆的共同特征是都能够运行（run），并且有唯一的5位车牌号（LicenseNumber）。机动车的共同特征是采用燃油发动机（FuelEngine），且能够驾驶（drive）。自行车的共同特征是能够骑行（ride）。电动车辆的共同特征是由电池（Battery）驱动。天然气车辆的共同特征是采用天然气（NaturalGas）作为动力。

要求：

(1)设计一个类体系描述上述车辆，写出它们的属性和方法。

(2)一家公司（Company）拥有10辆普通小汽车、5辆公交车、2辆电动小汽车和1辆天然气公交车，要求写一个方法listVehicles（）显示所有车辆的信息（车牌号以及采用的动力）。

程序文件命名为Exe4_3.java。-3. Known vehicle (Vehicle) including motor vehicle (MotoVehicle) and non-motorized (NonMotorVehicle) 2 species. Cars (Car), bus (Bus), etc. to motor vehicles, bicycles (Bicycle), etc. are non-motor vehicles. With the development of energy technologies, the emergence of electric bicycles (ElectricBicycle), electric cars (ElectricCar), natural gas buses (NaturalGasBus) and other new vehicles. A common feature of the vehicle is able to run (run), and there are only five license plate number (LicenseNumber). Common feature is the use of a motor vehicle fuel engine (FuelEngine), and is capable of driving (drive). Common feature is the ability to ride a bike (ride). Common characteristics of the electric vehicle is driven by a battery (Battery). A common feature is the use of natural gas vehicles (NaturalGas) as the driving force.

Claim:

(1) describe the design of a class system of the vehicle, write their properties and methods.

(2) a company (Company) owns 10 ordinary cars, five buses,