You're on an expedition searching for Mayan ruins, and your GPS has stopped working. It's August 2 and extremely hot and humid! Using other equipment, you measure and find that the sun is 1° from being perfectly overhead at its highest point during the day. Your anthropology professor, who got you into this mess by offering extra credit, says that you should be able to narrow down your latitude to 2 possibilities. What are they? St and mu? Explain.