Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to inflate a car tire with a bike pump [title] Park on a clear, flat surface. [step] A clear parking area will allow you to freely move around your car to fill up tires without anything getting in the way. Parking on a level surface will make it easier for you to balance and operate your pump.

Ending1: [title] Thread one end of the bike pump tube or tow bar through the tube/hole and attach it to a and () your bike pump. [step] The tube/hole should extend from the pump tube to the tire before it is secured. Ending2: [title] Place your feet on the ground close to the rear rack of your bike. [step] The ground will help to hold you upright as you inflate your tire. Ending3: [title] Place your bicycle outside of your bike. [step] Having your bicycle at a distance from your bike will make it easier for you to assist others. Ending4: [substeps] If you don't have a suitable clear, flat surface at home, you might park in the street or a neighbor's driveway. Driving on tires that are flat can damage your tire or deform the rims of your wheels, causing expensive damage.

Answer format: ending1/ending2/ending3/ending4