The following code produces count1 = 5 and count2 = 20. I need to understand why.

#include int main(void)

{ int m,n;

int count1=0;

int count2=0;

for (m=1; m<=5; m++)

{

count1++;

for (n=1;n<=7; n+=2)

count2++; }

printf("count1 = %d ", count1);

printf("count2 = %d ", count2);

return 0; }