Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to change the blades on a riding lawn mower [title] Check the condition of your mower blades to see if they need changing. [step] Turn it off and lock the brakes or chock the wheels. Disconnect spark plug (s).

Ending1: [title] Park the mower on a suitable work surface. [title] Raise the mower deck to its highest setting to make it easier to access the blades. Ending2: [title] Inspect the factory blades in your area. [substeps] Remove from the factory blades pre vin (owner's manual) and replace it with a new one in the same condition. Ending3: Use a small wrench to twist off snow plugs to verify they are back in place. Reconnect spark plug hoses to their positions. Ending4: Examine the operation of your mower blades. If they look one shade hotter then their previous degree (up to two's), it might be worth changing them.

Answer format: ending1/ending2/ending3/ending4