iTutor Physics Updates

Hi guys i'm trying figure out this question, i just want to know which order reaction it is? i think its 2nd order reaction, but im not sure. The removal of alcohol in the body occurs in the liver at a rate of 0.167 mlmin^-1. a sample is taken from a person at 07:00 in the morning had a alcohol content of 50 ml. assuming that they had not consumed any alcohol in the meantime, what was the alcohol content in their body 6 hours before? thank you