Questions about EV3285

I bought the BenQ PD3200U and had hoped to use the PbP feature to display 2 inputs of 1920x2160 next to each other. Unfortunately all I got were two small pictures of 1920x1080... Leaving half the screen unused. Does this screen manage 2 1920x2160? It would be a great feature for me. From the description, you can show two pictures... but would that be two or four at 1920x1080 or would it also be possible to get two at 1920x2160?

It is well known that these monitors have poor built-in speakers. Unfortunately, in the case of the smaller EV2785 model, in addition to the poor sound, the speakers also have the characteristic that they emit a constant low noise at volume 0. Is this also the case with the EV3285 model?

Unfortunately, I didn't get the Swiss Edition! The appliance cable has the Schuko! In the description above it even says under "Important notes": "Eizo Swiss Edition, 5-year full warranty on all parts with free 24-hour replacement service directly at your location." With emphasis on "Swiss Edition". I would be happy to receive an exchange

What cables are included with the monitor?

Can this monitor be hardware calibrated and if so how?

What kind of graphics card do I need to support 3840 x 2160 pixels? (Type / price range) Is it possible with only one display port cable? My box still has a GTX760 from 2014; it can hardly manage it. So not only does a monitor cost 1464.--, but a graphics card as well?