Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to make a cup anemometer [title] Make one incision on four cups. [step] Use plastic or paper cups. Use scissors to cut out a hole that is large enough to insert a straw or small stick.

Ending1: [title] Thread four straws , 1 at a time, through the hole. [step] Use a plastic or paper plate, non-stick, or place the cut end of the straw in the hole. Ending2: Slide a long file or file through the cup hole. [substeps] You can use a pencil to mark the hole as you cut. Ending3: You should make the hole a little less than halfway down the cup. This is where your cup will connect to the center cup. Ending4: Once the hole is cut, your cup is ready for serving. [substeps] Use scissors to cut off the bottoms of the three holes on each cup.

Answer format: ending1/ending2/ending3/ending4