Modify the project below:

#include

#include

$//$Author: Nhu Phan

$//$This program checks the validity of user input based on specific conditions.

$//$The input is valid if all alphabetic letters are lowercase, and non$-$alphabetic letters are limited to digits, whitespace, exclamation point, question mark, or period.

int main$()$

$\{$

$//$Declare variables

char ch;

int is$\_$valid$=1$; $//$Flag to track the validity of the input

$//$Prompt user for input

printf$("$Enter input: $")$;

$//$Read characters until a newline character is encountered

while$(($ch$=$getchar$())!=\text{'}$

$\text{'})$

$\{$

$//$Check if the character follows the specified conditions

if $(!($islower$($ch$)||$ isdigit$($ch$)||$ isspace$($ch$)||$ ch$==\text{'}!\text{'}||$ ch$==\text{'}?\text{'}||$ ch$==\text{'}.\text{'}))$

is$\_$valid $=0$;

$\}$

$//$Print the results based on the validity of the input

if $($is$\_$valid$)$

printf$("$valid$")$;

else

printf$("$invalid$")$;

return $0$;

$\}$

Requirements

Name your program project$5\_$valid.c$.$

Input characters are command line argument.

Character handling library functions in ctype.h are allowed.

The program should also check if the number of arguments on the command line is greater than $2($including $./$a$.$out as one of the arguments$).$ If the number of arguments is not greater than $2,$ the program should print "invalid number of arguments".

Follow the format of the examples below.

Examples $($your program must follow this format precisely$)$

Example #$1$

$ $./$a$.$out spring$\_24$

invalid

Example #$2$

$ $./$a$.$out $8$ little pigs!

valid

Example #$3$

$ $./$a$.$out

invalid number of arguments

Example #$4$

$ $./$a$.$out Computer Science?

invalid