II-1.c

#include <stdio.h>

int main()
{
  int index = 0;

  for (int i = 1; i <= 16; i = i * 2)
  {
    printf("%2d %2d\n", index, i);
    ++index;
  }
}

II-2.c

#include <stdio.h>
#define INCHES_IN_CM 0.3937

int main()
{
    int small, large;

    printf("\nEnter smaller number: ");
    scanf("%d", &small);

    do
    {
        printf("\nEnter larger number: ");
        scanf("%d", &large);

        if (large < small)
        {
            printf("\nError: Enter number greater than smaller number\n");
        }
        if ((large - small) > 10)
        {
            printf("\nError: Numbers should have only 10 interval\n");
        };

    } while (large < small || ((large - small) > 10));

    for (int i = small; i <= large; i++)
    {
        printf("%d %f\n", i, i * INCHES_IN_CM);
    }
}