1. def read_numbers_from_file(file_path): #cau a
2.     numbers = []
3.     with open(file_path, 'r') as file:
4.         line = file.readline().strip()
5.         numbers_str = line.split()
6.         for num_str in numbers_str:
7.             numbers.append(float(num_str))
8.     return numbers
9.  
10. def find_negative_numbers(numbers): #cau b
11.     negative_numbers = []
12.     for num in numbers:
13.         if num < 0:
14.             negative_numbers.append(num)
15.     return negative_numbers
16.  
17. def calculate_average_positive(numbers): #cau c
18.     positive_numbers = [num for num in numbers if num > 0]
19.     if not positive_numbers:
20.         return None
21.     average = sum(positive_numbers) / len(positive_numbers)
22.     return average
23.  
24. def is_prime(num): #cau d
25.     if num <= 1:
26.         return False
27.     for i in range(2, int(num**0.5) + 1):
28.         if num % i == 0:
29.             return False
30.     return True
31.  
32. def find_prime_numbers(numbers):
33.     return [num for num in numbers if is_prime(num)]
34.  
35. def calculate_average(numbers): #cau e
36.     total = sum(numbers)
37.     average = total / len(numbers)
38.     return average