I Need Help Arranging a Food Web?!?

Okayy, so I'm kinda at a loss, so if anyone can help me do this (Cause I don't understand it and my teacher is away and this is due on the day she comes back! D:)

I need to take these animals: Emperor penguin, krill, killer whale, humans, fish, phytoplankton, sperm whale, crabeater seal, Adelie penguin, elephant seal, leopard seal, squid, carnivorous plankton, blue whale and petrel and make a food web between the animals! Can someone help me?! I don't understand the dynamics of it (What eats what eats what etc...) So I want after school help but like i said, my teacher is missing :( Thanks for those who are smart enough for this!!!