If the government imposes a per-unit tax to be collected (given to the government) by the suppliers of a good, then

the relatively more inelastic is the demand curve for the good, the higher is the percentage of the per-unit tax paid by the consumers.

the relatively more elastic is the demand curve for the good, the higher is the percentage of the per-unit tax paid by the consumers.

the consumers always pay 50% of the per-unit tax.

the suppliers always pay a higher percentage of the per-unit tax than do the consumers.