2. The Zenith occurs in spring equinox. At the same day, find the altitude of the sun at noon at Bangkok (13.750N), Thailand. 3. The Zenith occurs in fall equinox. At the same day, find the altitude of the sun at noon at Bandung city (6.910S), Indonesia.
4. The Zenith occurs in summer solstice. At the same day, find the altitude of the sun at noon at Phnom Penh city (11.50N).
5. The Zenith occurs in summer solstice. At the same day, find the altitude of the sun at noon at Bandar Seri Begawan city (4.900N), Brunei.

Noted: subject Earth Science.