>>17358205~할 것이다 and ~하겠다 both means the same by anticipating future or doing it
it can be sound rude when you use 하겠다 as 'I will do it' but you can add 습니다 behind makes it sound super humble
~하겠습니다. 알겠습니다.
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-겠네 can be used as a question when you add question mark behind like other finishing words
it is like 'he will do sth won't he?' in english
hope my explanation make some sense
