how do you say "that's impossible" in Russian?

as in.. if somebody says "what are the chances that I can learn Russian fluently by the end of summer 2021 if I study by myself?" and the person next to him replies "that's impossible!"

Joseph2021-04-12T16:57:51Z

Eto ne vozmozhno.  Это не возможно.

Anonymous2021-04-07T16:44:23Z

did doofus hear of google translate?