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minimum hardware, software and internet access speed requirements
internet connection with minimum 4mbps speed. 
Operating System 
Personal Computers Mobile Devices with microphone and camera
MS Windows 7, 8, and 10 MS Windows 8.1 or later
Apple Macintosh 10.8 or later Apple iOS 8 or later
Ubuntu and Fedora Linux (recent versions) Android 4.0 or later
Browser :
 recommends using either Google Chrome or Mozilla Firefox.
The minimum versions required are 41 for Chrome, 49 for Firefox.