Consider the following method:

public a$($String s$)\{$

int v $=0$;

for$($int x $=1$; x $<$ s$.$length; x$=$x$+1)\{$

if$($s$[$x$]==\text{'}$a$\text{'}||$ s$[$x$]==\text{'}$e$\text{'}||$ s$[$x$]==\text{'}$i$\text{'}||$ s$[$x$]==\text{'}$o$\text{'}||$ s$[$x$]==\text{'}$u$\text{'})\{$

v $=$ v $+1$;

$\}$

$\}$

return v;

$\}$

Exactly how many lines of code $($statements$)$ are executed by the method a$()$ in the worst case? Express your answer in terms of n$,$ the length of the string s$.$

Hint: simplify your final answer as much as possible, and do not put spaces in your answer. Use juxtaposition for the multiplication operator, for example to write "nine times n$"$ write $"9$n$"$ not $"9$xn$"$ or $"9*$n$"$; to write "four times $($n$+2)"$ write $"4($n$+2)",$ not $"4$x$($n$+2)"$ or $"4*($n$+2)".$ Do not write your answer in Big$-$O notation. Write the exact number of lines executed.