A stationary wave is formed on a string stretched between two fixed points separated by $1.35\,\text{m}$, as shown. The wave speed on the string is $450\,\text{m s}^{-1}$. Determine the frequency of oscillation of the stationary wave?
- A$333\,\text{Hz}$
- B$405\,\text{Hz}$
- C$500\,\text{Hz}$
- D$1000\,\text{Hz}$