Party Drinking and Departure Order

Ordering of departure time (earlier $\rightarrow$ later):

• W left earlier than V: $W < V$.
• P left later than V: $V < P$.
• T left later than P: $P < T$.
• S left later than T: $T < S$.
• U left later than S: $S < U$. Putting departure times in order: $W < V < P < T < S < U$. Thus, W left the earliest.

Ordering of amount drunk (more $\rightarrow$ less):

• Q > U > V
• V > T > P
• P > W > R Putting amount drunk in order from most to least: $Q > U > V > T > P > W > R$. Thus, R drank the least.