Consider the following multi$-$threaded $C$ pseudocode:lock$($&mutex$)$;void$*$ msg $=$ popQueue$($&queue$)$;return msg;

$\}$

void addMsg$($void$*$ msg$)\{$pushQueue$($&queue, msg$)$;sem$\_$post$($&sem$)$;

$\}$How can you fix the bug$($s$)$ in this code? Select all of the changes that must be applied to make this code

work.

Swap lines $2$&$3$

Swap lines $3$&$4$

Swap lines $5$&$6$

Swap lines $11$ & $12$

None of these $($i$.$e$.,$ no bugs$)$