The last time the Nets were a young team trying to claw their way up from the NBA cellar, they had grown-ups in the room to show them how to make that climb.

With one of the youngest NBA rosters in the past 50 years and guidance more important than ever, do they have the teachers to provide it?

That remains to be seen.

“It’s very important, especially your first couple years in the league,” Jalen Wilson told The Post. “Everything’s moving fast, everything’s different from college. To have guys who’ve been through your shoes … it’s good to have.”

But do they have it?

DeMarre Carroll, Jared Dudley and Ed Davis played that role for D’Angelo Russell, Jarrett Allen and Caris LeVert, with Carroll and Dudley being current NBA assistants. Now with five rookies — three of them teens — it’s vit

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