6. (20 points) Here are four C propraus that connt the bits on in an integer; that is, you rum '. cb5 ' and it will print '2' (because 5 in binary is 101, and two bits are turned on). For each proyram, indicate whether it works. If it does not, show how to fix it by changing the feurest characters possible, Note that these programs will crash if not given an argument; that's not considered an error per the design spec. Program A Works as is. Needs fixing. \#include int main (int arge, char *argv[) f // warning: assumes argv[1]! int val =atoi(argv[1]); int sum =0; for (int 1=0;1=0;i ) if (val &1i ) sum +=1; printf ("\%d ", sum); \} Program C Works as is, Needs fixing. *include "include int main(int argc, char *argv[) c // warning: assumes argv[1]! int val = atoi(argv[1]); int sum =0; while ( val ) 1 if (val \#include int main(int argc, char *argv [ ) i // warning: assumes argv[1]! int val =strtoul(argv[1], NULL, 10) int suen =0; while (val) \{ sum +=val&1; val =1; \} printf (" //d ", sum); \}