Coop job?
Relax, if they are trying to fill a coop slot, then they are not looking for some rocket scientist who can solve all the world's problems in a day, nor are they looking for someone who will shoot up the management structure and become the youngest VP in history. They don't expect you to know all about "corporate America". They don't expect you to know every thing. They don't even expect you to show up with the right jacket and tie.
They are looking for samples. That's all. Like in an ice cream shop, you try out little scoops to see if that bucket over there is worth digging into. They know you won't be productive at all. They know you will be asking everyone tons of questions and slowing everyone down. But that is a small price to pay if you turn out to be a good catch *in the long run*.
Show them your thirst for learning. Show them your desire to improve.