Hi, I would really appreciate it if i could get some clarifications regarding the project? I have 4 questions: 1.Why would make and model in the VehicleType be the primary keys? Any two cars could have the same make and model(eg. Both cars are Hondas and they have the same model number like X5)So how would we distinguish between two cars of the same model/make? 2.Also,if the make/model are the same then wouldn't the doors ,trim, body etc. all be the same? Then wouldn't this table be redundant? 3.Why is fleet not an entity, when the database is used to manage the fleet of hire vehicles? 4.Where is the daily insurance and rental tariff in the DailyTariff entity?Because they were specifically given values in part1($3) so wouldn't they be attributes as well?Or are we supposed to assume that their IDs are included in the tariffID attributes?