Consider the below Matlab statements:

$x=[6\mathrm{.}4,-2\mathrm{.}8$;$1\mathrm{.}7,0\mathrm{.}2$;$8\mathrm{.}2,-7\mathrm{.}5$;$-1\mathrm{.}3,0\mathrm{.}4]$;

$y=x(3,$:$)$;

Write a Matlab statement to create a variable $"$z$"$ that is equivalent to $"$y$".$ Your answer cannot use the variables $"$x$"$ or $"$y$".$