privided is my code, what do i change my code in order to make the led$1$ turn on when code $2753$# is entered and led$1$ off when $*$ is entered. here is my code:

#include

#include

#include "mbed.h$"$

#define NUM$\_$ROWS $4$

#define NUM$\_$COLS $4$

#define ROW$\_$ACTIVE$\_$TIME $5$ms

$//$ Define the key map

char key$\_$map$[$NUM$\_$ROWS$][$NUM$\_$COLS$]=\{$

$\{\text{'}1\text{'},\text{'}2\text{'},\text{'}3\text{'},\text{'}$A$\text{'}\},//1$st row

$\{\text{'}4\text{'},\text{'}5\text{'},\text{'}6\text{'},\text{'}$B$\text{'}\},//2$nd row

$\{\text{'}7\text{'},\text{'}8\text{'},\text{'}9\text{'},\text{'}$C$\text{'}\},//3$rd row

$\{\text{'}*\text{'},\text{'}0\text{'},\text{'}$#$\text{'},\text{'}$D$\text{'}\}//4$th row

$\}$;

$//$ Define the LED

DigitalOut LED$1($LED$1)$;

DigitalOut ROW$1($PA$\_6)$;

DigitalOut ROW$2($PA$\_7)$;

DigitalOut ROW$3($PB$\_6)$;

DigitalOut ROW$4($PC$\_7)$;

DigitalIn COL$1($PA$\_9,$ PullUp$)$;

DigitalIn COL$2($PA$\_8,$ PullUp$)$;

DigitalIn COL$3($PB$\_10,$ PullUp$)$;

DigitalIn COL$4($PB$\_4,$ PullUp$)$;

$//$ Function to scan the columns

int col$\_$scan$()\{$

if $(!$COL$1)$

return $0$;

else if $(!$COL$2)$

return $1$;

else if $(!$COL$3)$

return $2$;

else if $(!$COL$4)$

return $3$;

else

return $-1$;

$\}$

$//$ Function to scan the keypad

char keypad$\_$scan$()\{$

static char sequence$[6]=\{0\}$; $//$ Initialize sequence with zeros

static int seq$\_$index $=0$;

for $($int i $=0$; i $<4$; i$++)\{$

$//$ Select the current row

switch $($i$)\{$

case $0$:

ROW$1=0$; ROW$2=1$; ROW$3=1$; ROW$4=1$;

break;

case $1$:

ROW$1=1$; ROW$2=0$; ROW$3=1$; ROW$4=1$;

break;

case $2$:

ROW$1=1$; ROW$2=1$; ROW$3=0$; ROW$4=1$;

break;

case $3$:

ROW$1=1$; ROW$2=1$; ROW$3=1$; ROW$4=0$;

break;

$\}$

$//$ Poll for key press

int col $=$ col$\_$scan$()$;

if $($col $!=-1)\{$

$//$ Key pressed

char key $=$ key$\_$map$[$i$][$col$]$;

if $($seq$\_$index $<5)\{//$ Keep track of the sequence until it reaches $5$ characters

sequence$[$seq$\_$index$++]=$ key;

$\}$

if $($seq$\_$index $==5)\{//$ Check if the sequence matches $"2753$#$"$

if $($strcmp$($sequence$,"2753$#$")==0)\{$

LED$1=1$; $//$ Turn on LED$1$

$\}$

$\}$

if $($key $==\text{'}*\text{'})\{//$ Check if $"*"$ is pressed

LED$1=0$; $//$ Turn off LED$1$

$\}$

return key;

$\}$

$//$ Delay to stabilize

ThisThread::sleep$\_$for$(5$ms$)$;

$\}$

$//$ No key pressed

return $\text{'}\backslash 0\text{'}$;

$\}$

int main$()\{$

while $(1)\{$

char key $=$ keypad$\_$scan$()$;

if $($key $!=\text{'}\backslash 0\text{'})\{$

printf$("$Key pressed: $\%$c$\backslash$r

$",$ key$)$;

$//$ Do something with the key

$\}$

ThisThread::sleep$\_$for$(100$ms$)$; $//$ Adjust the delay as needed

$\}$

$\}$