LG - 27U411A-B 27" Full HD IPS Monitor, 120Hz, HDR10, Reader Mode, Flicker Safe, HDMI - Black

yes but I have separate speakers I'm using.

If it will fit the mounting set up on the back of the monitor then yes, you can.

No... But I have my monitor sitting on a circular device that allows me to move it from side to side or all the way around. You can't adjust the screen up or down for viewing.

I have 2 laptops hooked up to one monitor and I'm using a "K switch". Before that I was using an HDMI switch but the K switch works better for me.