Design a 3D model of a robotic vehicle with four independent wheel arms. Each arm is connected via a movable joint , extendable arms and controlled by a gear system driven by gear motors. The chassis should have space for a microcontroller and battery pack. The design should be modular, . Wheels should be mounted with rotational freedom, and all joints should function properly. The wheels will be extendable along the Y-axis, controlled by gears.