Installation of Graphviz

A. For Windows Users:
1. Download the Graphviz installer from the official Graphviz website.
2. Run the installer and follow the instructions to complete the installation.
3. Add Graphviz to PATH:
   (After installation, you need to add the Graphviz bin directory to your system's PATH environment variable.)
   (The typical path for Graphviz installation is C:\Program Files (x86)\Graphviz2.38\bin.)
   To add this to your PATH: 
   3.1. Right-click on "This PC" or "Computer" on the desktop or in File Explorer. 
   3.2. Select "Properties". 
   3.3. Click on "Advanced system settings". 
   3.4. In the System Properties window, click on the "Environment Variables" button. 
   3.5. In the Environment Variables window, find the "Path" variable in the "System variables" section and select it, then click "Edit". 
   3.6. Click "New" and add the path to the Graphviz bin directory (e.g., C:\Program Files (x86)\Graphviz2.38\bin). 
   3.7. Click "OK" to close all the windows. 
   
B. For Linux Users
Install Graphviz via Package Manager:
You can install Graphviz using your distribution's package manager. For example, on Ubuntu, you can use the following command:
        sudo apt-get update
        sudo apt-get install graphviz 
