What will be the output of the following C codes:

1. #include <stdio.h>
   
   int main()
   {
   	int x=123;
   	int i={
   		printf("c" "++")
   	};
   	
   	for(x=0;x<=i;x++){
   		printf("%x ",x);
   	}
   	
   	return 0;
   }

2. #include <stdio.h> 
   
   int main() 
   { 
   	int i; 
   
   	for(i=0; i<=5; i++) i = i+5;
   	
   	printf("%d", i);
   	return 0; 
   }

3. #include <stdio.h> 
     
   int main() 
   { 
   	int a = 10; 
   	int b = 2; 
   	int c; 
     
   	c = (a & b); 
   	printf("c= %d", c); 
     
   	return 0; 
   }

4. #include <stdio.h> 
     
   int main() 
   { 
   	int x[] = {10,20,30,40}; 
   	int i, m = 0, m2 = 0; 
     
   	for(i=0; i<4; i++) m += x[i];
   	m = m/4;
   	for(i=0; i<4; i++) m2 += (x[i] - m);
   
   	printf("%d", m2); 
     
   	return 0; 
   }