JavaScript is one of the most popular languages used by programmers all around the world. In this course, you'll be introduced to the Object-Oriented Paradigm of JavaScript. The course will discuss OOP in both, ES5 and ES6 versions of JavaScript. It begins with a basic introduction to what Object-Oriented programming is, followed by its comparison to other languages. It then introduces the new  OOP features available in ES6 version and compares it to the ES5 version. The course then discusses objects in JavaScript followed by the use of function as objects in OOP. It goes over the interesting concepts of prototype objects, data encapsulation, and classes. It then delves into the more complex concepts of inheritance in both the versions, including prototypal inheritance, prototype chaining, method overriding and mixins. The course is filled with interesting illustrations to help in your understanding of the concepts as well as numerous quizzes and exercises to help you practice.

Learn Object-Oriented Programming in JavaScript

# Problem Statement
In this exercise, you have to implement inheritance in between classes in ES6 version of JavaScript.

# Task 1
The base class `Vehicle` is declared below. You have to define its `constructor`. The `constructor` should contain:

* **Protected** values `_speed` and `_model`.

* Methods `getModel` and `getSpeed` which return the **protected** speed and model values.

# Task 2
The child class `Car` is also declared. You have to:

* Modify its declaration such that it extends the `Vehicle` class.

* Define and initialize its `constructor`.

* Implement a function `setDetails(name)` in it which takes a string `name` and sets it as the name of the `Car`. 


* Implement a function `getDetails(carName)` in it which takes a string `carName` and appends it with the model, name, and speed of the car. It should store the final result in a variable and return it. 



# Sample Input
```
getDetails(X)
getDetails(S)
getDetails(Roadster)
```
# Sample Output
```
X, Tesla, 100
S, Tesla, 100
Roadster, Tesla, 100
```

In this exercise, you need to implement inheritance between two classes, Vehicle, and Car.

Exercise 3: Inheritance with Cars

Problem Statement