A $2\mathrm{.}0-$g string that is $0\mathrm{.}67$ m long is under tension. The string vibrates at $800$ Hz tone in its third harmonic, and this vibration causes a sound wave. What is the wavelength of the sound? The speed of sound in air is $\backslash (344\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash )\mathrm{.}0\mathrm{.}670\mathrm{.}550\mathrm{.}490\mathrm{.}610\mathrm{.}43$