if k $==19$

z $=$ z $*1\mathrm{.}5$

elseif k $<=400$

z $=$ z $-20$

else

z $=$ z $+$ sin$($z$)$

end

Which statement is true about this $"$if$"$ block?

Whenever $"$k$"$ is less than $400,"$z $=$ z $-20"$ will always be executed.

For any value of $"$k$","$z $=$ z $-20"$ will always be executed.

$"$z $=$ z $-20"$ can never be executed

When $"$k$"$ equals negative three, $"$z $=$ z $-20"$ will be executed.