the answer is 50 seconds because that is the time it takes for the process that runs the longest running one after another would take longer (70 seconds), but running parallel would only take 45 seconds

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

even_numbers = [num for num in numbers if num % 2 == 0]

print(even_numbers)
[2, 4, 6, 8, 10]