///
Объяснение:
1)
import random
numbers = [random.randint(0, 50) for _ in range(20)]
print("Массив: ", " ".join([str(i) for i in numbers])
print("Сумма четных элементов: ", sum(numbers[::2]))
2)
numbers = [i for i in range(10, 51)]
for number in numbers:
if number % 21 ==0:
print(number)
