Trees quiz question no.3

#1

please give me solution for ques no.3

#2

hello @varu
please refer this article -> https://www.geeksforgeeks.org/ugc-net-ugc-net-cs-2016-july-iii-question-35/

#3

sir ,i have asked for question no.3 to find big o sum of all height for all nodes in perfect tree

#4