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A transverse traveling sinusoidal wave on a string has a frequency of 100 Hz, a wavelength of 0.040 m and an amplitude of 20 mm. The masum velocity of any point on the string is _________

a. 0.20 m/s
b. 1.3 m/s
c. 4.0 m/s
d. 15 m/s
e. 25 m/s