The tension in a strings is $12\mathrm{.}2$ N$,$ and its linear density is $0\mathrm{.}819$ kg$/$m$.$ A wave on the string travels toward the $-$x direction; it has an amplitude of $3\mathrm{.}08$ cm and a frequency of $11\mathrm{.}6$ Hz$.$ What are the speed, and wavelength $($in terms of m$)$ of the wave? Write down a mathematical expression $($like Equation $16\mathrm{.}3$ or $16\mathrm{.}4)$ for the wave, substituting numbers for the variables A$,$ f and lamda