Write a method DisplayDigits that separates digits by spaces

Question

I need help with my homework assignment. The assignment is write a method DisplayDigits that receives an integer between 1 and 99999 and displays it as a sequence of digits, separating each pair of digits by two spaces. For example, 4562 should appear as 4 5 6 2
I have tried several ways but all of them failed. I'm new to C#.

Attempt 1.

    static void Main()
    { int numbers;
        Console.Write("Enter a number between 1 and 99999: ");
        numbers = Convert.ToInt32(Console.ReadLine());
        DisplayDigits(numbers); }

    public static void DisplayDigits(int numbers)
    { int digit1, digit2, digit3, digit4;

        while ((numbers / 1) % 10 != 0)
        { if ((numbers / 10000) % 10 == 0)
                break;
            else digit1 = (numbers / 10000) % 10;
            if ((numbers / 1000) % 10 == 0)
                break;
            else digit2 = (numbers / 1000) % 10;
            if ((numbers / 100) % 10 == 0)
                break;
            else digit3 = (numbers / 100) % 10;
            if ((numbers / 10) % 10 == 0)
                break;
            else digit4 = (numbers / 10) % 10;

            Console.WriteLine( // didnt finish it because it wouldnt work for any numbers with zero }

Attempt 2.

    static void Main()
    { string  numbers;
        Console.Write("Enter a number between 1 and 99999: ");
        numbers = Console.ReadLine();
        DisplayDigits(numbers); }

    public static void DisplayDigits(string numbers)
    { string[] digits = new string[numbers.Length];
        for (int i =0; i<numbers.Length; i++)
            Console.WriteLine("  " + digits[i]); }

 Attempt 3.

   static void Main()
    {  string numbers;
        Console.Write("Enter a number between 1 and 99999: ");
        numbers = Console.ReadLine();
        DisplayDigits(numbers); }

        public static void DisplayDigits(string numbers)
    { Console.WriteLine(String.Format("{0:#  #  #  #  #}", numbers))}