Third Harmonic Frequency?

Question

What is the third harmonic frequency of a 1.73 m string fixed at both ends that has a wave speed of 212 m/s?

Answer 1

The third harmonic will have 3/2 λ = L and λ = 2/3 L

f = v/λ = v/(2/3 L) = 3/2 v/L (You can plug into this equation)

This frequency is 3f₁ where f₁ is the 1st harmonic or fundamental (f₁ = v/(2L))