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

messages from a buffer with size $3($i$.$e$.,$ there are $3$ slots for messages in the buffer$).$ Note

that the buffer functions are not thread$-$safe.sem$\_$wait$($&channel$->$sem$1)$;data $=$ buffer$\_$remove$($channel$->$buffer$)$;sem$\_$post$($&channel$->$sem$1)$;$\}$

void send$\_$msg$($channel$\_$t$*$ channel, void$*$ data$)\{$sem$\_$wait$($&channel$->$sem$3)$;sem$\_$post$($&channel$->$sem$1)$;$\}$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 $5$&$6$

Swap lines $11$&$12$

Swap lines $14$&$15$

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

$\}$

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$)$