Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to muffle a fan [title] Check that the fan's blades are evenly spaced and aligned. [step] Bend any blades out of position back into place. Do this very carefully as the blades could snap.

Ending1: [title] Oil a fan's motor bearings if you hear a grinding, ticking or rubbing noise as the fan spins. [step] Use a non-detergent motor oil that is lightweight. Ending2: [title] Find a steady, sturdy object to hold onto. [step] A box, coffee can, or some other kind of flat surface will make it much easier to hold the fan. Ending3: [title] Shut up any other fans that may be in the room. [title] Turn off all other fans in the room. Ending4: Also look at the connectors on the blades. Note if your blades are well grooved or not.

Answer format: ending1/ending2/ending3/ending4