What time zone is observed in the Australian state of Western Australia?

Which of the following time zones is not observed in the United States? What is the time zone of the Chatham Islands, New Zealand? Which time zone is observed in the state of Hawaii, USA? What is the time zone offset for India? What is the time zone offset for the state of Alaska, USA during standard time? What is the time zone offset for South Africa? What time zone is observed in the Brazilian state of Acre? What is the time zone offset for the Australian state of New South Wales during daylight saving time?