Given Tasks

coding tasks:

Fisrt Task:

We have a class representing binary tree nodes: class BTN { int val; BTN left; BTN right; } please implement method to compare 2 such trees (returns: true if fully equal, false - otherwise)

Second Task:

We have a class : class Element { int num; String name; int age; } please implement method taking Collection as an argument and returning Collection where all elements are unique by "num" and age>20. In case of ambiguity, put in target collection any of input elements.

Third Task:

We do have 2 tables in a relational database: ∙ Clients (client_id(PK), client_name) ∙ Orders (order_id(PK), client_id, order_sum, order_date) Please write the following SQL queries: a- list of clients, which have an order with order_sum > 50 b- clients, whose total sum of orders exceeds 100

The answers are in the folders which named in their own order

Note: Important

Before starting the second task/application kindly "restore NuGet packages"