What word describes the third-from-last item in a series, such as a syllable?

Anoushka Shankar is famous for playing which instrument, like her father Ravi Shankar? Photographer Ansel Adams, writer William Saroyan and President Richard Nixon were all born in which state? Anson Jones was the last president of which independent nation before it joined the United States? Which British explorer discovered Antarctica's McMurdo Sound in 1841 and has a nearby sea and ice shelf named for him? Besides ants, which insects make up a major part of an anteater's diet? Antelope Island, home to a herd of bison, lies in the Great Salt Lake in which state? Which Anthony Burgess novel of 1962 follows a violent teenage delinquent named Alex? Anthony Davis's opera "Tania" depicts the 1974 kidnapping of which newspaper heiress?