Very hard Harmonic Motion, Waves and Sound Problame?

A sound Source produceding waves of frequency 600Hz caused a 1.0m string with fixed ends to vibrate in a standing wave patten. When the sme string is simpley pluked so that it vibrates in its fundamantal mode , it will first resonate with a long, hollow tube immersed in water when the tube is withdrawn 0.27m from the water. What is the wave speed on the string?/ The spped of sound from the data given?? If the string continues to vibrate in its fundamental mode , how far must the tube be raised out of the water to reach another resonance??