give root binary tree return average value node level form array Answers 105 actual answer accept Example 1input root 3920nullnull157output 30000014500001100000explanation the average value node level 0 3 level 1 145 level 2 11hence return 3 145 11example 2input root 3920157output 30000014500001100000 ConstraintsThe number nod tree range 1 104231 Nodeval 231 1