M3) Decreasing sequence

The function in Listing 1 builds a string from the values visited by a for loop.

Listing 1: A for loop with a step of -2 (Question 1).

def mysterious_loop(n: int) -> str:
    result = ""  # Text to return after the loop.

    for i in range(n, 0, -2):
        result = result + str(i) + " "

    return result

What does mysterious_loop return for n = 0, n = 1, n = 5, and n = 6? Each visited number is followed by one space.

1. n = 0: "" / n = 1: "1 " / n = 5: "5 3 1 " / n = 6: "6 4 2 ".
2. n = 0: "0 " / n = 1: "1 " / n = 5: "5 3 1 -1 " / n = 6: "6 4 2 0 ".
3. n = 0: "" / n = 1: "1 " / n = 5: "5 3 1 -1 " / n = 6: "6 4 2 0 ".
4. n = 0: "" / n = 1: "1 " / n = 5: "5 4 3 2 1" / n = 6: "6 4 2 0 ".