Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to make a clay whistle [title] Start with approximately 455 grams (1 lb) of clay. [substeps] Purchase clay at arts and crafts retail chains, like michaels, or retailers such as target/walmart. [title] Make two balls of clay, and make two small pots.

Ending1: [step] These will be the ears of the whistle. Choose one for the head and one for the mouth, for addition. Ending2: [substeps] You want your clay pots in a shape similar to a duck. They should be a little smaller and slightly closer to one another. Ending3: [step] Take the ball of clay and press your thumb into the middle of it. Keep your thumb inserted into bowl and pinch clay to form the pinch pots. Ending4: [step] Move the small balls around in the clay until you get the right sound. Drop the clay balls on a work surface, smooth out any rough edges, and freeze.

Answer format: ending1/ending2/ending3/ending4