Build a Website

Hello, I am looking for a website which will be able to support the following features : 1. Video Conferencing (not chat) feature with a presenter and multiple audience. 2. Presenter able to admit/remove any Candidate who wants to enter the meeting. 3. Screen sharing and take control Option with trainer. Like existing functionalities of "Microsoft Lync" "Skype for Business", "Cisco Webex". 4. Audience video screen should have a “Interrupt” button allowing to Interrupt the trainer and put forward a query. 5. Panel(External device) to sketch through some pen, and the realtime figure showing on student’s screen. A typical e.g. of the device is here : https://www.amazon.in/Wacom-CTL-490-B0-CX-Draw-Tablet/dp/B0176299PG/ref=lp_1375416031_1_7?s=computers&ie=UTF8&qid=1508667570&sr=1-7 the user sketches some figure and the image displays on the laptop/desktop it is configured with. What I want is, to show the realtime image to the same video chat screen. 6. To make the video communication interactive, the presenter should be able to post a set of pre-written questions during the conversation. The audience can see it in the video itself realtime and choose one of the available options/YES or NO/ Test panel to write down the answer. Post which an instant analysis goes to the presenter (e.g. How many students selected the correct [login to view URL] etc)