Transverse waves on a string have wave speed $8\mathrm{.}00$ m$>$s$,$ ampli$-$ tude $0\mathrm{.}0700$ m$,$ and wavelength $0\mathrm{.}320$ m$.$ These waves travel in the x direction, and at t $=0$ the x $=0$ end of the string is at y $=0$ and moving downward. $($a$)$ Find the frequency, period, and wave number k $=2$p$>$l of these waves. $($b$)$ Write the equation for y$1$x$,$ t$2$ describ$-$ ing these waves. $($c$)$ Find the transverse displacement of a point on

the string at x $=0\mathrm{.}360$ m at time t $=0\mathrm{.}130$ s