Use the diagram below, which shows Earth in orbit around the Sun, and the Moon in orbit around Earth, to answer the following two questions.
M1, M2, M3, and M4 indicate positions of the Moon in its orbit. Letter A indicates a location on Earth's surface.
An observer at location A on Earth views the Moon when it is at position M 1. Which phase of the Moon will the observer see?
full moon
new moon
third quarter
waxing gibbous