Can play 8G Ram COD WARZONE?

Well, basically... It should be, especially at medium settings, though the graphics will be soap, but it's your decision

Ive got a pc nearly identical to the one you described. Yes, it'll run warzone.

Yes you can, but graphics card can be better, maybe you have to change some settings to mid-low

You can but it wont be efficient probably... depends on the rest of your setup though

you can play it, but you will prob have some stutters

Yes but I will recommend getting 16gb to avoid crashes.