Projector Displaying 4 Images?

[olds]

I have a need to use a projector that will display up to 4 different sources at once. Mostly, Cable TV, OTA TV, PC X 2.
What's the best way to go about this and be able to switch the audio between sources?

TIA

 

[Kartajan]

this is the fancy way (with a price tag to match): https://www.skreens.com/

One cheap way (3 pip with 1 "big") https://www.amazon.com/aLLreLi-Port-Splitter-Picture-picture/dp/B00M0HF2TU

 

[olds]

Thanks.