Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to identify military rank (us army ) [title] Know where to look for insignia. [step] Enlisted soldiers' uniforms include the army combat uniform (acu), which is typically made of camouflaged print fabric, and the " green " uniform, which is made of a heavy fabric coat and trousers or skirt. Insignia will be displayed on various places depending on the type of uniform : [substeps] Look on the cap of an acu.

Ending1: Enlisted soldiers display their rank insignia in the center of their caps. A rank insignia patch will be sewn on the chest area of an acu. Ending2: The acu also usually contains spray paint that will contrast with the somewhat dark tint of the uniform. Look at the sleeve cap in which the insignia should be located. Ending3: Look on the insignia for a specific symbol. Check on the shoulders for symbols that resemble soldiers wearing field uniforms like the illuminated american flag or the camelback insignia. Ending4: Label an acu on the side opposite or inside of the emblem on an army-specific t-shirt or other similar piece of paper. Look on the strap of an artillery gun.

Answer format: ending1/ending2/ending3/ending4