I assume 
has counterclockwise orientation when viewed from above.
By Stokes' theorem,
so we first compute the curl:
Then parameterize 
by
where the 
-component is obtained from
with 
and 
.
Take the normal vector to to be
Then the line integral is equal in value to the surface integral,
Answer: I think its D
Explanation:I sort of made a coordinate graph
Answer:
do 10 20 20 40 50
Step-by-step explanation:
hope it helps sorry if it does not if not then try 1 2 3 4 5
