Six strings, all having the same lengths, are stretched taut between two fixed points. The tensions, F, and masses, m, of the strings vary as shown. A transverse pulse with a given amplitude is initiated near one end of each of the strings and propagates toward the other end. Rank the speeds of the pulses along their respective strings from highest to lowest. If two (or more) strings have the same speed, give them the same ranking. Explain the reasoning you employed to arrive at your rankings.

String A: F = 2.0 N; m = 0.050 kg
String B: F = 1.5 N; m = 0.075 kg
String C: F = 4.0 N; m = 0.100 kg
String D: F = 1.5 N; m = 0.025 kg
String E: F = 2.0 N; m = 0.100 kg
String G: F = 6.0 N; m = 0.150 kg