Ein basically = 1 (one), but unlike the way it goes in Deutschland number system. Here, one = eins. now, in case of demons nouns, eine is used. And in case of masculine or neuter nouns, ein is used.
Danke is thank you or thanks
I wanna say it’s a or c but i’m not sure
Auf Wiedersehen is the most accepted and formal translation. Bye, which is a informal, would translate to Tschuss.
Hope it helped,
BioTeacher101