The Wave Function Y(x,t)for a Standing Wave on a String

Multiple Choice

The wave function y(x,t) for a standing wave on a string fixed at both ends is given by y(x,t) = 0.080 sin 6.0x cos 600t where the units are SI.The speed of the traveling waves that result in this standing wave is

A) 6.00 m
B) 1.05 m
C) 600 m
D) 0.010 m
E) impossible to tell given this information about the standing wave.