URGENT !!! need help with these 3 integrals problems

Hi, I need urgent help with these 3 integrals problems ... been stuck on the questions and the deadline is Friday. Thanks a lot ! :)


1) For the green's theorem,

Attachment 55873

I got the answer : 27.552. Not sure whether it is correct. Please kindly explain in steps so I know where I went wrong.


2) I'm totally unsure about finding the surface integral. How do I know the shape of the surface ?

Attachment 55874


3) and finding the curl function f

Attachment 55875


All I know is, it has something to do with curl. Something like F = grad f. How do I find the function ?


Thanks again ! :)