1. What is design pattern. A design pattern is a proven, reusable solution to a commonly occurring software design problem. It represents best practices developed by experienced software developers to solve recurring problems in object‑oriented design. 2.What is Facade Design Pattern. The Facade Design Pattern is a structural design pattern that provides a simple interface to a complex system. It hides the complexity of multiple classes or subsystems and gives the client a single, easy-to-use interface. 3. Why Do We Need Facade Pattern? Problem Statement:  In large applications: Façade solves: 4. Key Components of Facade Pattern 1. Facade Class 2. Subsystem Classes 3. Client Facade Design pattern Example Imagine an application that contains multiple interfaces…