What is the difference between пити and п'є
I wrote xто п'є молоко and that was wrong
Your 'x' is from Latin alphabet not from Cyrillic, you can see how it's slightly shorter than rest of the letters.
Where is the apostrophe on the Ukrainian Keyboard?
Same as the english one. With the other punctuation symbols
To the left of the 1 key at the top of the keyboard.