The Power Generated by Two Lifts

Think about the question below. Only one of the answers listed is correct. We'll do some (but probably not all) of these questions in the lectures when you will all be asked to vote on which answer you think is correct. (Soon afterwards, you'll be able to see your responses, and those of the whole class at EVAF.)

Two lifts in the AT, both of mass 400kg when empty, ascend a height of 10m. Lift A carries 10 people and takes 10s. Lift B carries 6 people and takes 8s. Which lift develops greater power ? (Assume each lift occupant weighs 80kg).
1
Lift A
2
Lift B
3
Both the same