Question

A spaceship lands on a new planet. the crew decides to measure the speed of sound in the planets atmosphere. taking a tube with a length of 50 cm, they find that one resonant frequency occurs at 2,520 Hz, and the next resonant frequency at 2,940 hz. what is the speed of the sound? what is the number of each harmonic? what type of pipe is the crew using (open at both ends, closed at both ends, or one end open and the other closed)?

show steps please!