g A string of length L and mass m is attached to a ceiling. A mass M hangs in equilibrium from the end of the string. The mass M is then moved back and forth to produce a transverse wave that travels up the string towards the ceiling. It can be assumed that M >> m so that the weight of the string does not contribute to any tension forces. Consider a situation where you would like to have the wave move faster. You can change the string mass (m), the hanging mass (M), the string length (L), or the frequency of the back and forth motion. Identify at least two changes involving only one of these quantities that would increase the speed of the travelling wave.