$(2$pts$)$ What is the program if $y$ is passed to foo by value $/$ reference? Explain your answer.

$x$ :integer

$x$:$=2$

procedure foo $($y:integer$)$

$,y$:$=8$

$,$print $x$

$,$print $y$

$x$:$=4$

foo$($x$)$

print $x$