Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to hum [title] Begin singing a note. [step] Open your mouth and begin vocalizing a certain note or pitch. Keep your lips parted slightly and your jaw, throat and diaphragm relaxed.

Ending1: Make sure to register that the note is right for you, and start filling in the rest of your teeth as you sing. [title] Keep your jaw loose and your tongue down. Ending2: You should feel the vibrations of the note originating at your vocal cords. [substeps] The only real difference between singing and humming is that when humming, the movements of the mouth are taken out of the equation. Ending3: You should feel a fluttering in your lower esophagus, tummy, and stomach. You will almost always want to lower your vocal string into the lowest setting you can comfortably sing the note in. Ending4: As you sing the note, drop your mouth slightly to line it with your own notes. [substeps] If you aren't sure whether you feel comfortable vocalizing, feel free to ask a family member or close friend to sing along with you.

Answer format: ending1/ending2/ending3/ending4