1.
[2069, 2060, 2071]
➤
2.
(4)
[2076]
[2071]
(2.5)
[2072]
3.
[2060]
[2068, 2067]
4.
[2069]
5.
[2070, 2068, 2067]
[2068]
(1+3=4)