Baisser has numerous meanings in French: to lower, to drop, to decline, to decrease, to fade. "Baisse-toi" is likely to be an imperative meaning 'drop down'.
Assieds-toi means "sit down" in English.
from you
Assieds-toi means 'sit down'.
Decris-toi translated into English from French means"describe yourself".
and you too
it means "you too "
Stand up
on return to you
"You" (singular form), in the predicate of a sentence.
Because it is you.
and the same to you
Very well, and you?