An automobile manufacturer is preparing a shipment of cars and trucks on acargo ship that can carry 21,600 tons. The cars weigh 3.6 tons each and thetrucks weigh 7.5 tons each.1. Write an equation that represents the weight constraint of a shipment. Let cbe the number of cars and t be the number of trucks.2. For one shipment, trucks are loaded first and cars are loaded afterwards.(Even though trucks are bulkier than cars, a shipment can consist of alltrucks as long as it is within the weight limit.)Find the number of cars that can be shipped if the cargo already has:a. 480 trucksb. 1,500 trucksc. 2,736 trucksd.t trucks