The diagram below shows the standing wave formed by a string connected to an oscillator vibrating at 120 Hz. (note: cm)

A) What is the wavelength of the vibration?
B) What is the speed of the waves traveling along the string? The amplitude at an antinode is 0.01 meters
C) How far does one point at an antinode move in one full period?
D) What is the average speed of a point on the string at an antinode?
E) If the air temperature is 20℃, what is the speed, wavelength and frequency of this vibration when it moves through air?