A car rental company has multiple branches across the US. Each branch has multiple rental cars and trucks. Each rental car/truck is located at one branch at any given point in time. Each rental car/truck is manufactured by one car/truck manufacturer. There are multiple car/truck manufacturers. Each customer can rent multiple cars/trucks in a period. Each car/truck is rented by one customer at a time. Identify several attributes and a key field for each entity. Represent this situation with an E-R diagram. State assumptions if any

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