Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a gas tank [title] Disconnect the tank. [step] Before doing anything, you need to disconnect the tank from the motorcycle or other machinery. Without disconnecting it, you won't be able to access it or safely clean it.

Ending1: Unstrap the tank and unscrew screws or bolts that secure it. [substeps] For lawnmowers and similar items, you'll need to remove the fuel line and spark plugs. Ending2: Disconnect the gas tank from the bike or other machinery by turning off the auto-peels connected to the lower tank. You'll have to do this in three ways : [substeps] Unhook the tank or panels that hold the fuel tank away from the engine and disconnect the gas tank from the hoses. Ending3: That means turning the key to the off position and holding down the brake pedal simultaneously (and maybe allowing the motorcycle to start). [substeps] If you plan to clean the gas tank first, turn the key to the off position and release the gas pedal. Ending4: [substeps] Disconnect the gas tank from the motorcycle. [title] Clean the tank if it has one.

Answer format: ending1/ending2/ending3/ending4