A5

bool neighbor13(intv[], int numItems)
{
  if(numItems <= 1)
    {
        return false;
    }
    else 
    {
        if(v[numItems - 1] + v[numItems -2] == 13)
        {
        return true;
        }
        return neighbor13(v, numItems - 1);
    }
}

void rotateRight(int v[], int numItems)
{
  if (numItems > 1)
    {
        int temp = v[numItems - 1];
        v[numItems - 1] = v[numItems - 2];
        v[numItems - 2] = temp;
        rotateRight(v, numItems - 1);
    }
}