The following function calls supposedly write a single new-line character, but some are incorrect. Identify which calls don't work and explain why.

    printf("%c", '\n');        

    printf("%c", "\n");        

    printf("%s", '\n');        

    printf("%s", "\n");        

    printf('\n');              

    printf("\n");              

    putchar('\n');             

    putchar("\n");              

    puts('\n');                

    puts("\n");                

    puts("");