Hi Folks. Could anyone please advise on this grammar:

"Here are three red tables

Am I correct in thinking that after 2,3, and 4 the nouns are no longer nominitive but genitive singular instead? What happens to the adjective - is it also genitive singular or maybe genitive plural?

And (from гость) how would I say:

I want to feed the tall guests

I want to feed two tall guests

TIA
Rob