What number will be written last to the numbers.txt file?

Question

Python

Hey!
I myself answered 9999, but the answer is wrong.

from threading import Thread

def just_print():
  with open('numbers.txt', 'w') as f:
    for i in range(10_000):
      f.write(str(i) + '\n')
  print('finished just_print')


t1 = Thread(target=just_print)
t1.daemon = True
t1.start()

for i in range(10):
  print(i*2)

Answer options:

1. none of the options
   
2. 42
   
3. no number will be written to the file
   
4. 9999
   
5. 7014
   
6. code execution does not have a well-defined result
   
7. 2916