A traveling displacement wave pulse takes the form:$-((0\mathrm{.}81$m$-1)$x$+(15\mathrm{.}7$s$-)$t$-27\mathrm{.}39)2$y$($x$,$t$)=$ Ymaxe$2$mm$.$The peak amplitude of the wave pulse is Ymax $=3\mathrm{.}1($The following questions will be marked correct onlyif your answer is within $1\%$ of the correct value.$)$What is the velocity of the wave pulse?